The partial pressure of a gas is the pressure it would exert if it occupied the same volume by itself. In this case, we need to find the partial pressure of O2 in the container. The answer is B. 0.30 atm.
To do this, we can use Dalton's Law of Partial Pressures which states that the total pressure of a mixture of gases is equal to the sum of the partial pressures of the individual gases.We know that the total pressure inside the container is 0.75 atm. We also know that the container contains 0.2 moles of O2 gas and 0.3 moles of N2 gas.
To find the partial pressure of O2, we need to first calculate the total number of moles of gas in the container. This is simply the sum of the moles of O2 and N2: Total moles of gas = 0.2 moles O2 + 0.3 moles N2 = 0.5 moles
Next, we can use the mole fraction of O2 in the mixture to calculate the partial pressure of O2:
Mole fraction of O2 = moles of O2 / total moles of gas
Mole fraction of O2 = 0.2 moles / 0.5 moles = 0.4
Finally, we can use the mole fraction to calculate the partial pressure of O2:
Partial pressure of O2 = mole fraction of O2 x total pressure
Partial pressure of O2 = 0.4 x 0.75 atm = 0.30 atm
Therefore, the answer is B. 0.30 atm.
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The total moles of gas in the container are:
n(total) = n(O2) + n(N2) = 0.2 mol + 0.3 mol = 0.5 mol
Using the partial pressure formula:
P(O2) = X(O2) x P(total)
where X(O2) is the mole fraction of O2 and can be calculated as:
X(O2) = n(O2) / n(total) = 0.2 mol / 0.5 mol = 0.4
Plugging in the values:
P(O2) = 0.4 x 0.75 atm = 0.30 atm
Therefore, the partial pressure of O2 in the glass container is 0.30 atm, which is option B. Moles of gas is a unit used to measure the quantity of gas molecules or atoms in a sample. It is commonly denoted by the symbol "n" and is based on the concept of Avogadro's law, which states that equal volumes of gases at the same temperature and pressure contain an equal number of molecules. One mole of any gas contains approximately 6.022 x 10^23 gas particles, which is known as Avogadro's number (represented as Nₐ). This value is a fundamental constant in chemistry and is used to relate the microscopic world of atoms and molecules to the macroscopic world of grams and moles.
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Where is the youngest rock in the Atlantic Ocean found?
plz hurry
Answer:
Seafloor Ages
They found that the youngest rocks on the seafloor were at the mid-ocean ridges. The rocks get older with distance from the ridge crest.
hope this helped
Two forms of energy found in all systems are kinetic energy and
Answer:
Potential energy
Explanation:
Which member of each pair is more metallic? (a) Na or Cs (b) Mg or Rb (c) As or N
(a) Cs is more metallic than Na.
(b) Rb is more metallic than Mg.
(c) N is less metallic than As.
Metallic character refers to the ability of an atom to lose electrons and form positive ions. Elements with more electrons in their outermost shell tend to have higher metallic character.
In pair (a), Cs has a larger atomic radius and more shielding electrons than Na, making it easier for Cs to lose electrons and become a positive ion, indicating higher metallic character.
In pair (b), Rb has a larger atomic radius and more shielding electrons than Mg, making it easier for Rb to lose electrons and become a positive ion, indicating higher metallic character.
In pair (c), As has one more electron than N in the same energy level, leading to a smaller atomic radius and less shielding electrons for As. Therefore, N is less electronegative and has higher metallic character compared to As.
Overall, Cs, Rb, and N have higher metallic character compared to Na, Mg, and As respectively.
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2H₂ + O₂ → 2H₂O
Convert grams of H₂ to grams of H₂O.
a. 44,680 g H₂O
b. 5,000 g H₂O
c. 345676543 g H₂O
d. 3335 g H₂O
Answer:
500100 benswuer kers olá Marilene
The mass of H₂O is 44,680 g for the given reaction 2H₂ + O₂ → 2H₂O. Therefore, the correct option is option A.
What is mass?In physics, mass is a quantitative measurement of inertia, a basic characteristic of all matter. It essentially refers to a body of matter's resistance to changing its speed or location in response to the force that is applied. The change caused by either an applied force is smaller the more mass a body has.
The kilogramme, which is defined approximately equal to 6.6 × 10⁻³⁴ joule second in terms of Planck's constant, is the unit of mass inside the Worldwide System of Units (SI). A joule is equivalent to one kilogramme multiplied by one square metre per second. The mass of H₂O is 44,680 g for the given reaction 2H₂ + O₂ → 2H₂O.
Therefore, the correct option is option A.
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Calculate the standard enthalpy of reaction
for the reaction 2 Na (s) + 2 H₂O (l)
2 NaOH (aq) + H₂ (g), Standard enthalpies
formation are -285.8 kJ/mol for H₂O and -470. 11 kJ/mol for NaOH (aq).
Answer:
-368.62 kJ/mol
Explanation:
[(2 x - 470.11 kJ/mol) ( 0kJ/mol)] - [ 2 x -285.8 kJ/mol) (2x 0 kj/mol)] = -368.62 kJ/mol
how many unpaired d-electrons are there in the octahedral high-spin cobalt(iii) complex ion, [cof6]3-? (small ligand field splitting)
There are three unpaired d-electrons in the octahedral high-spin cobalt(iii) complex ion, [CoF6]3- (small ligand field splitting).
In an octahedral high-spin cobalt(iii) complex with small ligand field splitting, the d-electrons occupy the t2g and eg orbitals. As all six ligands are small, they generate a weak ligand field, which results in the energy difference between the t2g and eg orbitals being small, allowing for a high-spin configuration. Cobalt(iii) has five d-electrons, which fill the t2g orbitals first with three electrons, leaving two unpaired electrons in the eg orbitals. Therefore, the complex has three unpaired d-electrons. There are three unpaired d-electrons in [CoF6]3- due to high-spin configuration and weak ligand field splitting, causing a small energy difference between the t2g and eg orbitals.
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Calculate the solubility of silver phosphate, Ag3PO4, in pure water. Ksp = 2.6 x 10-18 O 1.5 x 10-5 M O 4.0 x 10-5 M O 4.0 x 10-6 M O 1.8 x 10-5 M O < 1.0 x 10-5M
The solubility of silver phosphate, Ag₃PO₄, in pure water is approximately 2.6 x 10⁻⁶ mol/L.
Solubility is the maximum amount of solute that can be dissolved in a given amount of solvent at a particular temperature and pressure, usually expressed in units of grams per liter (g/L) or moles per liter (mol/L).
The solubility of Ag₃PO₄ can be calculated using the Ksp expression;
[tex]K_{sp}[/tex] = [Ag⁺]³ [PO₄³⁻]
Let x be the solubility of Ag₃PO₄ in mol/L. Then, at equilibrium, the concentrations of Ag⁺ and PO₄³⁻ ions will be x mol/L. Therefore;
[tex]K_{sp}[/tex] = (x)³ (x)³ = x⁶
Solving for x, we get;
x = [tex](Ksp)^{(1/6)}[/tex] = (2.6 x 10⁻¹⁸[tex])^{1/6}[/tex]
≈ 2.6 x 10⁻⁶ mol/L
Therefore, the solubility is 2.6 x 10⁻⁶ mol/L.
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Does hydrogen have similar physical properties to alkali metals?
Answer:
YESExplanation:
because it contain 1 electron in its outermost shelldraw the major organic product when each of the below reagents is added to 3,3-dimethylbutene.
The major organic product formed when each of the reagents is added to 3,3-dimethylbutene is as follows:
HBr: The major product is 3-bromo-3,3-dimethylbutane.
H₂SO₄ (concentrated sulfuric acid): The major product is 2,3-dimethylbut-2-ene (also known as 2,3-dimethylbutene or diisobutene).
HgSO₄ (mercuric sulfate) followed by H₂O: The major product is 3,3-dimethyl-2-butanol.
What is the major organic product?Addition of HBr to 3,3-dimethylbutene results in the electrophilic addition of the H-Br bond across the double bond, forming a bromine atom attached to the carbon at the site of the double bond. The major product is 3-bromo-3,3-dimethylbutane.
Concentrated sulfuric acid (H₂SO₄) acts as a dehydrating agent, removing a molecule of water from 3,3-dimethylbutene. This results in the formation of 2,3-dimethylbut-2-ene, where the double bond is shifted to the neighboring carbon atoms.
The addition of mercuric sulfate (HgSO₄) followed by water (H₂O) leads to oxymercuration-demercuration. The mercuric sulfate adds across the double bond to form a mercurinium ion intermediate, which is then reduced by water.
This process results in the formation of 3,3-dimethyl-2-butanol, where the hydroxyl group is added to one of the carbon atoms of the double bond.
It's important to note that these reactions are general representations, and the actual stereochemistry of the products may vary depending on the specific conditions and reaction conditions used.
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which of the following is and example of a chemical property?
What is the molarity of a 300.0 mL solution containing 25.0 g of NaCl?
Answer:
1,43 M
Explanation:
molair mass NaCl = 58,44 g/mol
You need to calculate how many moles 25 g is:
25 g / 58,44 g/mol = 0,4278 mol
0,4278 mol / 0,3 L = 1,43 M
magine that 500 ml of a 0.100 m solution of hoac(aq) is prepared. what will be the [oac–] at equilibrium in this solution if the acid dissociation constant ka(hoac) = 1.79 x 10–5?
The equilibrium concentration of OAc- in the 500 mL of 0.100 M solution of HOAc(aq) with a Ka(HOAc) of 1.79 x 10-5 will be approximately 0.00134 M..
To find the [OAc-] at equilibrium, we need to use the Ka expression and an ICE (Initial, Change, Equilibrium) table. The Ka expression for the dissociation of acetic acid (HOAc) is Ka = [H+][OAc-]/[HOAc]. Initially, [HOAc] = 0.100 M, [H+] = 0, and [OAc-] = 0. During the dissociation, [HOAc] will decrease by x, [H+] will increase by x, and [OAc-] will increase by x.
At equilibrium:
Ka = [H+][OAc-]/[HOAc]
1.79 x 10-5 = (x)(x)/(0.100-x)
We can assume that x is small compared to 0.100, so we can simplify the equation to:
1.79 x 10-5 = (x^2)/0.100
Now, solve for x:
x^2 = 1.79 x 10-5 * 0.100
x^2 = 1.79 x 10-6
x ≈ 0.00134
Since x represents the change in [H+] and [OAc-], the equilibrium concentration of OAc- is approximately 0.00134 M.
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Nepal is rich in species diversity why?? Explain with any three reason. Help this beginer out !!!
Answer:
Nepal is a multilingual, multiethnic, multicultural and multi-religious nation. Unity in diversity is the defining characteristics of Nepali society. Mutual coexistence, tolerance and cooperation have guided the people in achieving social cohesion, peace and happiness.
Explanation:
Please mark as brainliest!
.Write chemical equations to represent each of the following & identify the type of reaction that occurs.
1. reaction of cesium metal with chlorine gas
2. formation of sodium peroxidefrom reactants in elemental form
3. reaction of magnesium and brominegas
4. reaction of calcium with nitrogen gas followed by additional step of water workup.
5. combustion of potassium to form potassium superoxide
6. combustion of lithium metal in oxygen gas
7. lithium metal heated in the presence of hydrogen gas and subsequently treated with water
8. production of titanium metal throughthe reduction of titanium(IV) chloride with sodium metal
The production of titanium metal through the reduction of titanium(IV) chloride with sodium metal involves a redox reaction. Titanium(IV) chloride is a compound that contains titanium in the +4 oxidation state, while sodium metal is an element with a tendency to lose electrons to form Na+ ions.
The reduction of titanium(IV) chloride involves the transfer of electrons from sodium metal to titanium(IV) ions.
The chemical equation for the reaction is:
TiCl4 + 4Na → Ti + 4NaCl
This equation shows that one molecule of titanium(IV) chloride reacts with four atoms of sodium to produce one atom of titanium and four molecules of sodium chloride.
The reduction of titanium(IV) chloride with sodium metal is an example of a single-displacement reaction. In this type of reaction, one element displaces another element in a compound to form a new compound and a different element. In this case, sodium metal displaces the titanium(IV) ion in titanium(IV) chloride to form titanium metal and sodium chloride.
In summary, the production of titanium metal through the reduction of titanium(IV) chloride with sodium metal involves a redox reaction in which titanium(IV) ions are reduced to titanium metal by sodium metal. The chemical equation for the reaction is TiCl4 + 4Na → Ti + 4NaCl, and the reaction is a single-displacement reaction.
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In most solutions containing a strong or weak acid, the autoionization of water can be neglected when calculating [H3O+]. Explain why this is so ?
In most solutions containing a strong or weak acid, the autoionization of water can be neglected when calculating [H3O+].
The reason for this is related to the relative concentrations of H3O+ ions produced by the acid and the autoionization process of water.
When an acid is added to water, it donates a proton (H+) to the water molecules, which form hydronium ions (H3O+). In the case of a strong acid,
the dissociation is nearly complete, leading to a high concentration of H3O+ ions. For weak acids, the dissociation is partial, but it still contributes a significant amount of H3O+ ions to the solution.
On the other hand, the autoionization of water is a self-ionization process where two water molecules interact, with one donating a proton to the other,
forming a hydronium ion (H3O+) and a hydroxide ion (OH-). However, the equilibrium constant for this process, Kw, is
very small (approximately 1.0 x 10^-14 at 25°C), which means that the concentration of H3O+ ions produced by water's autoionization is extremely low.
Since the concentration of H3O+ ions contributed by the acid is much greater than that produced by the autoionization of water,
it is reasonable to neglect the autoionization of water when calculating [H3O+]. This simplifies the calculations and provides an accurate enough estimation of the hydronium ion concentration in most acid solutions.
In summary, the autoionization of water can be neglected when calculating [H3O+] in solutions containing strong or weak acids due to the significantly higher concentration of H3O+ ions contributed by the acid.
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6. El oxígeno gaseoso se calienta a presión constate de 50 °C a 300 K. Se conoce que inicialmente el volumen del sistema era de 1,3 litros. ¿Cuál es el volumen final del sistema?
Answer:
El volumen final del sistema es 1.2L
Explanation:
La ley de Charles establece que el incremento de la temperatura de un gas produce un incremento en el volumen directamente proporcional cuando la presión permanece constante. La ecuación es:
V₁/T₁ = V₂/T₂
Donde V es volumen y T temperatura absoluta de un gas en 1, el estado inicial y 2, su estado final.
Reemplazando:
V₁ = 1.3L
T₁ = 50°C + 273.15K = 323.15K
V₂ = Incógnita
T₂ = 300K
1.3L/323.15K = V₂/300K
1.2L = V₂
El volumen final del sistema es 1.2Lvery urgent
1. Describe an experiment to show the chemical effect of electric current.
2. State three conditions necessary for combustion
3. Describe all that you observe when a piece of iron is placed in copper sulphate solution for a
few minutes.
Explanation:
STEP 1- Take two iron nails.
STEP 2- Clean it with sand paper.
STEP 3- Wrap copper wire around both the nails. And connect the other end to the battery terminal.
STEP 4- Take water in beaker and little amount of salt in it or a few drpos of sulphuric acid in it.
STEP 5- Immerse the nails in the solution.
STEP 6- Observe the nails carefully. You can see bubbles of gases coming out from water near nails.
When, electeric current is passed through water gases like hydrogen and oxygen are evolved.
2.Three things are required in proper combination before ignition and combustion can take place---Heat, Oxygen and Fuel. There must be Fuel to burn. There must be Air to supply oxygen. There must be Heat (ignition temperature) to start and continue the combustion process.
When iron is placed in Copper sulphate solution, the iron is coated with a brown coloured substance "copper" and CuSo4 solution changes from blue to light green. This is due to iron displaces copper as it is more reactive than copper.
What is the answer to the formula 12+6/2+10?
0 25
O 14
O 19
03.6
The answer was 25
Do according to bodmas rule
Consider the data [X] [Y] [Z] initial rate M M M M · s −1 Exp 1 0.30 0.20 0.35 0.210 Exp 2 0.60 0.10 0.70 0.420 Exp 3 0.60 0.20 0.70 0.420 Exp 4 0.60 0.40 0.35 0.105 What is a correct rate law for the reaction?
Answer:
Rate = k [X]⁻¹ [Z]²
Explanation:
[X] [Y] [Z] initial rate M M M M · s −1
Exp 1 0.30 0.20 0.35 0.210
Exp 2 0.60 0.10 0.70 0.420
Exp 3 0.60 0.20 0.70 0.420
Exp 4 0.60 0.40 0.35 0.105
In Experiment 2 and 3 where the concentrations of Y and Z were constant, doubling the concentration of Y had no effect on the rate of the reaction. This means, that the rate of the reaction is zero order with respect to Y.
In experiment 3 and 4, dividing the concentration of Z by 2, causes the rate of the reaction to decrease by 4. This means the rate of the reaction is second order with respect to Z.
In experiment 1 and 4, doubling the concentration of X, causes the rate of the reaction to decrease by half. This means that X has an order of -1 with respect to the rate of the reaction.
The rate expression is given as;
Rate = k [X]⁻¹[Y]⁰[Z]²
Rate = k [X]⁻¹ [Z]²
Help please!! I'll name you brainliest!!
Answer:
MgO
Explanation:
an analytical chemist is titrating 229.6 ml of a 1.100 m solution of acetic acid with a 0.7600 m solution of naoh.
The analytical chemist is performing a titration to determine the concentration of an acetic acid solution.
The chemist will add a known concentration of sodium hydroxide solution to the acetic acid solution until the equivalence point is reached, at which all of the acetic acid will have reacted with the sodium hydroxide.
By measuring the volume of sodium hydroxide solution required to reach the equivalence point, the chemist can calculate the concentration of the acetic acid solution.
In this specific titration, the acetic acid solution is 1.100 M and the sodium hydroxide solution is 0.7600 M, and the volume of the acetic acid solution used in the titration is 229.6 mL.
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What is the meaning of this painting
Answer: things arnent always as they seem
Explanation:
For which slightly soluble substance will the addition of HCl to its solution have no effect on its solubility? a. AgBr(s) b. PbF2(s) c. MgCO3(s) d. Cu(OH)2(s)
The substance for which the addition of HCl to its solution will have no effect on its solubility is [tex]PbF_2[/tex](s) (option b).
The addition of HCl to a solution can affect the solubility of some slightly soluble substances by reacting with them to form a more soluble compound. The solubility of a substance may increase or decrease depending on the nature of the reaction.
a. AgBr(s) - The addition of HCl to a solution of AgBr will decrease its solubility because AgBr will react with HCl to form a more soluble compound, silver chloride (AgCl).
b. [tex]PbF_2[/tex](s) - The addition of HCl to a solution of [tex]PbF_2[/tex] will have no effect on its solubility because [tex]PbF_2[/tex] is insoluble in water and does not react with HCl.
c. [tex]MgCO_3[/tex](s) - The addition of HCl to a solution of [tex]MgCO_3[/tex] will decrease its solubility because [tex]MgCO_3[/tex] will react with HCl to form a more soluble compound, magnesium chloride ([tex]MgCl_2[/tex]), and carbon dioxide ([tex]CO_2[/tex]).
d. [tex]Cu(OH)_2[/tex](s) - The addition of HCl to a solution of [tex]Cu(OH)_2[/tex] will decrease its solubility because [tex]Cu(OH)_2[/tex] will react with HCl to form a more soluble compound, copper chloride ([tex]CuCl_2[/tex]), and water ([tex]H_2O[/tex]).
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(Cr2O7)2{-} + H2O2 + H{+} = CrO5 + H2O - Chemical Equation Balancer
The balanced chemical equation represents the stoichiometry of the reaction and ensures that the number of atoms of each element on both sides of the equation is equal, which is necessary for the conservation of mass during a chemical reaction.
The balanced chemical equation for the reaction of dichromate ion [(Cr2O7)2-] with hydrogen peroxide (H2O2) and hydrogen ion (H+) to produce chromate ion (CrO5) and water (H2O) can be written as:
2(Cr2O7)2- + 8H2O2 + 12H+ → 4CrO5 + 16H2O
In this reaction, the dichromate ion is reduced to chromate ion and hydrogen peroxide is oxidized to water. The reaction takes place in an acidic medium, which provides hydrogen ions to protonate the peroxide ion and facilitate the reduction of dichromate ion. The balanced equation shows that two molecules of dichromate ion, eight molecules of hydrogen peroxide, and twelve hydrogen ions are required to produce four molecules of chromate ion and sixteen molecules of water.
Overall, the balanced chemical equation represents the stoichiometry of the reaction and ensures that the number of atoms of each element on both sides of the equation is equal, which is necessary for the conservation of mass during a chemical reaction.
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calculate the boiling point (in degrees c) of a solution made by dissolving 3.71 g of fructose (c6h12o6) in 87 g of water. the kbp of the solvent is 0.512 k/m and the normal boiling point is 373 k.
Boiling point = Normal boiling point + ΔT = 373 K + (3.71 g/180.16 g/mol) * (0.512 K/m) / (0.087 kg) = 374.12 K.
To calculate the boiling point of the solution, we'll first find the molality (m) of fructose.
Molality is defined as moles of solute per kilogram of solvent.
1. Calculate moles of fructose: (3.71 g) / (180.16 g/mol) = 0.0206 mol
2. Convert grams of water to kilograms: 87 g = 0.087 kg
3. Calculate molality: (0.0206 mol) / (0.087 kg) = 0.237 m
Next, we'll use the molality and the Kbp (0.512 K/m) to find the change in boiling point (ΔT).
4. Calculate ΔT: (0.237 m) * (0.512 K/m) = 0.121 K
Finally, add ΔT to the normal boiling point (373 K).
5. Boiling point = 373 K + 0.121 K = 374.12 K
The boiling point of the solution is 374.12 K, or approximately 101.0°C.
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The boiling point of the solution would be 100.34°C.
To calculate the boiling point elevation, we can use the formula:
ΔTb = Kbp x molality
where ΔTb is the boiling point elevation, Kbp is the boiling point elevation constant of the solvent, and molality is the concentration of the solution in terms of moles of solute per kilogram of solvent.
First, we need to calculate the molality of the solution. We know the mass of fructose (3.71 g) and the mass of water (87 g). We can convert the mass of fructose to moles by dividing by its molar mass:
moles of fructose = 3.71 g / 180.16 g/mol = 0.0206 mol
Then, we can calculate the molality:
molality = moles of fructose / mass of water in kg
molality = 0.0206 mol / 0.087 kg = 0.237 mol/kg
Now we can calculate the boiling point elevation:
ΔTb = Kbp x molality
ΔTb = 0.512 K/m x 0.237 mol/kg = 0.1216 K
Finally, we can calculate the boiling point of the solution:
Boiling point of solution = normal boiling point of solvent + ΔTb
Boiling point of solution = 373 K + 0.1216 K = 373.12 K
We can convert the boiling point to Celsius by subtracting 273.15:
Boiling point of solution = 373.12 K - 273.15 = 100.34°C
Therefore, the boiling point of the solution is 100.34°C.
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How many carbon (C) atoms are in CaCO3?
Answer:one atom
Explanation:
The carbon symbol is C so only one
Calcium has 1 atom
Oxygen has 3 atoms
Answer:
Only one Carbon atom
Explanation:
CaCO3 is composed of one atom of Calcium, one atom of Carbon and three atoms of oxygen
what’s another term for weak solutions
If u mean in terms of concentration, it will be 'Dilute'
One that is almost or entirely ionized in water is considered to be a strong acid or alkali. Nitric acid, sulfuric acid, and hydrochloric acid are a few examples. Weak solutions are not ionized in water.
What is a weak solution ?Bases provide a similar problem: a strong base is one that is completely ionized in solution. A weak base is one that is less than 100% ionized in solution.
The fundamental elements that do not completely ionize in water are known as weak bases. Ammonia is one substance that is a weak base. A portion of NH3 that dissolves in water separates into ammonium cation.
An acid that partially separates into its ions in water or an aqueous solution is referred to as a weak acid. On the other hand, in water, a strong acid completely dissociates into its ions. While the conjugate acid of a weak base is also a weak acid, the conjugate base of a weak acid is also a weak solution.
Thus, Weak solutions are not ionized in water.
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which element has a smaller atomic radius than strontium (Sr)?
it is tecnically magnesium,
Answer:
barium is the answer
If you have 3 moles of calcium carbonate, how many grams of calcium bicarbonate are formed?
Answer:
hhjcioz xlioyudiyyxyisrupautwtritu regards Roy
What is the measurement between two points known as?
Answer:
The measurement between to points is known as the distance