Answer:
Soluble salts can be made by reacting acids with soluble or insoluble reactants. Titration must be used if the reactants are soluble. Insoluble salts are made by precipitation reactions.
Making insoluble salts
An insoluble salt can be prepared by reacting two suitable solutions together to form a precipitate.
Determining suitable solutions
All nitrates and all sodium salts are soluble. This means a given precipitate XY can be produced by mixing together solutions of:
X nitrate
sodium Y
For example, to prepare a precipitate of calcium carbonate:
X = calcium and Y = carbonate
mix calcium nitrate solution and sodium carbonate solution together
calcium nitrate + sodium carbonate → sodium nitrate + calcium carbonate
Ca(NO3)2(aq) + Na2CO3(aq) → 2NaNO3(aq) + CaCO3(s)
It also works if potassium carbonate solution or ammonium carbonate solution is used instead of sodium carbonate solution. Remember that all common potassium and ammonium salts are soluble.
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Explanation:
Mix lead nitrate and sodium carbonate solutions, forming lead carbonate precipitate, filter, wash, and dry.
To obtain a pure dry sample of solid lead carbonate (PbCO₃), follow these steps:
Prepare Solutions: Dissolve lead nitrate (Pb(NO₃)₂) in water to make a lead nitrate solution, and dissolve sodium carbonate (Na₂CO₃) in a separate container to make a sodium carbonate solution.
Mixing Solutions: Slowly add the sodium carbonate solution to the lead nitrate solution, drop by drop, while stirring. A white precipitate of lead carbonate will form.
Precipitate Formation: Pb(NO₃)₂(aq) + Na₂CO₃(aq) → PbCO₃(s) + 2NaNO₃(aq)
Filtration: Carefully filter the mixture to separate the solid lead carbonate precipitate from the remaining solution (filtrate).
Washing: Wash the precipitate with distilled water to remove any remaining soluble impurities.
Drying: Place the wet lead carbonate precipitate on a filter paper and let it air dry or use an oven at a low temperature. Once completely dry, a pure sample of solid lead carbonate is obtained.
This process ensures the separation of lead carbonate from the solutions and other compounds, yielding a dry and pure sample of the desired compound.
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Which of the following could be the chemical formula for a compound?
Group of answer choices
C + O2
Si
H2O
Zn
Answer:
H20
Explanation:
3. Are quartz and coal minerals or only naturally occurring
substances?
Answer:
minerals
Explanation:
coal is made from decomposing matter
Which of the following factors is NOT significant in determining the effectiveness of a microbial treatment?
The susceptibility of the microbe to the treatment.
The concentration of the treatment.
The toxins secreted by the microbe being treated.
The length of exposure to the treatment
Is a new substance created when Ammonia is added to copper chloride?
Answer :Ammonia is added to a solution containing copper chloride, producing the deep blue adduct. When acid is added, the reaction is reversed.
Explanation:yes
Answer:
Ammonia is added to a solution containing copper chloride, producing the deep blue adduct. When acid is added, the reaction is reversed.
Explanation:
how you steal a bus?
Answer:
break into it hotwire it and drive duhh
Explanation:
force acts on it.
Newton's first law of motion states that an object remains at rest unless a
a. balanced
c. gravitational
b. frictional
d. net
Answer:D.
Explanation:
if you change the _ you change the identity of the atom
Answer:
protons
Explanation:
remember that the number of protons in the nucleus determines the protons identity
Answer:
Number of protons
Explanation:
The number of protons is unique to each element's identity and corresponds with the atomic number.
if your not sure pls don’t answer.this is science btw.
Answer:
north and south
Answer:
north and south
Explanation:
!!
6. What type of relationship is shown in the image below?
1 point
500
400
300
Mass, 9
200
100
0
0
200
400
600
800
1000
Volume, ml
Direct
Exponential
O Indirect
Inverse
Answer:
A direct relationship
Explanation:
The graph shows a direct relationship due to the fact that the line is going up in a positive correlation/increasing as the amount of mass and volume increase.
What is the acceleration between 20 to 30 seconds?
Answer:
It would start at 0 and keep graduatly growing bigger and bigger numbers
Explanation:
A student has a sample of aluminum that has a mass of 27 g and a volume of 10cm3. What is the density of aluminum
Answer:
270 g/cm^3
Explanation:
d = mv
d = 27 g × 10cm^3
d = 270 g/cm^3
PLEASE HELP MEEEEE. Calculate how many grams of hydrogen are needed to synthesize 56g of nitrogen in ammonia.
Answer:
We need 168g of hydrogen in making the ammonia
Explanation:
Using the comparison of coefficient as mol and divide it to the known molecules and multiply it by the grams of known molecule.
Water is called the ____ ______
Water is called the universal solvent
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An unidentified flying object has crashed in your yard! An alien emerges from the wreckage. The alien tells you that it has traveled here from the planet Geela which is 5.670x10^3 light years away. How many miles away is Geela? 1.06 x 10^-16 light years = 6.21 x 10^-4 miles
Answer : Geela away is [tex]33.22\times 10^{15}\text{ miles}[/tex]
Explanation :
As we are given that the alien tells you that it has traveled here from the planet Geela which is 5.670 × 10³ light years away.
And we know that:
[tex]1.06\times 10^{-16}\text{ light years}=6.21\times 10^{-4}\text{ miles}[/tex]
Now we have to determine the distance away is Geela.
As, [tex]1.06\times 10^{-16}\text{ light years}=6.21\times 10^{-4}\text{ miles}[/tex]
So, [tex]5.670\times 10^{3}\text{ light years}=\frac{5.670\times 10^{3}\text{ light years}}{1.06\times 10^{-16}\text{ light years}}\times 6.21\times 10^{-4}\text{ miles}[/tex]
= [tex]33.22\times 10^{15}\text{ miles}[/tex]
Therefore, the Geela away is [tex]33.22\times 10^{15}\text{ miles}[/tex]
what are the similarities and differences of the light waves on material
Answer:
1. Sound is longitudinal waves, light waves is transverse
2. Sound is a mechanical wave, light is an electromagnetic wave
3. Speed of sound is less than the speed of light waves. For example, in air, sound travels at approximately 333.1 m/s, while light travels at about 3*10^8 m/s
4. Sound waves can't be plane-polarized while light waves can be polarized.
Explanation:
what do you need to move a soccer ball?
Which of the following statements is true?
A. Magnesium (Mg) is brittle.
B. Iodine (I) is magnetic.
C. Copper (Cu) conducts heat.
D. Iron (Fe) has a low density.
Answer:
I think it's C.copper conducts heat
The elements of the periodic table are arranged in the families and periods based on their properties. Copper (Cu) is a transition metal that can conduct electricity. Thus, option C is correct.
What are transition metals?Transition metals are the metallic elements that are arranged in groups 3 - 12 and periods 4-7. They are also called d-block elements due to the electron present in the d orbit of the atom making them capable of bond formation.
They all show the properties of metals that include shininess, luster, conductivity, etc. The series include copper, iron, cobalt, gold, zinc, chromium, nickel, manganese, molybdenum, etc.
Copper being a transition metal has the property of conducting electricity and is used in wirings as they have loosely bounded electrons in their shell that can carry the electrical charge in a circuit.
Therefore, option C. copper (Cu) can conduct electricity and heat is correct.
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what are air pollutants
Answer:
things that pollute the air
Explanation:
nuclear energy, fossil fuels, gas from cars and other transportation, and these all contribute to greenhouse gases that are harmful to the environment
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A force of 20 N is applied to a cart with a mass of 3 kg. What is the acceleration of the cart?
Answer:
The answer is 6.67 m/s²Explanation:
The acceleration of an object given it's mass and the force acting on it can be found by using the formula
[tex]a = \frac{f}{m} \\ [/tex]
where
f is the force
m is the mass
From the question we have
[tex]a = \frac{20}{3} \\ = 6.6666666...[/tex]
We have the final answer as
6.67 m/s²Hope this helps you
The deciduous forest supports a diverse ecology. A warm growing season with abundant moisture encourages plants to grow, and the ground is covered with small plants, flowers, ferns, and grasses. In spring the trees and shrubs produce new leaves and colorful flowers. In summer the tall trees cast shade on the forest floor, providing ideal growing conditions for shade-tolerant plants. Seeds and berries provide for plant reproduction, and feed small rodents and birds. The leaves that fall in the autumn provide plenty of material for decomposers, soil bacteria, worms, grubs, and fungi. All these plants together are the primary producers. If berries were destroyed and taken out of the food web, which organisms would be directly affected? *
10 points
Captionless Image
The snake, the owl, and the fox would be directly affected by the loss of berries.
The mouse and the frog would be directly affected by the loss of berries.
No organisms in the food web would be directly affected by the loss of berries.
The squirrels, rabbits, and grasshoppers would be directly affected by the loss of berries.
Answer:
The squirrels, rabbits, and grasshoppers would be directly affected by the loss of berries.
Explanation:
Refer to the attached picture below.
The arrows in the diagram represent which way the energy flows. There are only three ways the energy flows directly to an organism. Those are to the grasshopper, the frog, and the rabbit. (in the picture below, these are circled in red.)
Therefore, we can assume that the correct answer would be D. The squirrels, rabbits, and grasshoppers would be directly affected by the loss of berries.
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500 cm3 of a solution has a concentration of 1. 5mol/dm3 how many moles are in the solution?
Answer:
There is 0.75moles in the solution
Answer:
Explanation:
concentration=no.of moles/volume in dm3
which is
1.5mol/dm3 multiply by 500/1000
=0.75moles
This formula equation is unbalanced.
P4(s) + Cl2(g) Right arrow. PCl3(l)
Which coefficient should be placed in front of PCl3 to balance this equation?
1
2
4
6
Answer:
4
Explanation:
Answer to balance the equation
P4 + 6Cl2 => 4PCl3
Answer:
C
Explanation:
Identify which of these molecules has the highest boiling point and give the reasoning why in terms of intermolecular force. CHCI3,CH3COOH, CO2
Answer:
CH3COOH
Explanation:
CH3COOH has the highest boiling point because it participates in the strongest intermolecular interactions. The -OH group can participate in hydrogen bonding with other -OH groups. Hydrogen bonds are very strong because they are the result of large partial positive charge on the hydrogen and large partial negative charge on the oxygen. When surrounded by other -OH groups, the partial positive charge on the hydrogen can form temporary bonds with the partial negative charge of an oxygen on another molecule. The stronger the intermolecular interactions, the more difficult they are to overcome, thus increasing the boiling point.
The strongest IMF the other molecules participate in are dipole-dipole. These interactions are not as strong as hydrogen bonding.
What are the 4 properties of the atom?
Answer:
Typical sizes of atom and nucleus.
Most of atom's mass is in the nucleus.
Constituents: protons, neutrons, electrons.
Electric force holds atom together.
Explanation:
K electron configuration
Answer:
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Explanation:
how many columns are there in the s blocks of the periodic table
This table shows the mass and volume of four different objects.
Which ranks the objects from most to least dense?
X, Y, W, Z
X, Z, Y, W
W, Y, Z, X
Z, Y, X, W
Answer:
second one/ B
Explanation:
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Answer:b
Explanation:
In any chemical change, matter changes into an entirely
different substance with different chemical properties.
True or false
Answer:
True
Explanation:
Find the distance that a car traveled that went 50 miles per hour in 3 hours.
The car travels 50 miles per hour. To find the distance it travelled in 3 hours, multiple 50 by 3.
50 x 3 = 150
Therefore, the car would travel 150 miles in 3 hours.
What is the mass number of a cobalt atom that has 27 protons and
30 neutrons?
Answer:
all u need to do is this 27 + 30 = 57.
Explanation: