CAVA Chemistry 302/303B Unit 2 Lab Report
THE MYSTERY SALT
Imagine that you have a barrel of salt, but you forgot to label it. You know it must be either KNO3, or KCl.
You look at the solubility curves for KNO3 and KCl and you find that at 35 degrees Celsius, 100 g of water can dissolve about 30 g of KNO3, or about 37 g of KCl.
The solubility curves disappear. You only remember the solubility for both salts at 35 degrees Celsius in 100g of water. You know absolutely nothing else about these salts.
You have a scale, a hot plate, a thermometer, empty beakers, and plenty of water. You do NOT have any labeled KNO3 or KCl.
1. What property can you use to determine whether the barrel contains KNO3 or KCl? Hint: Name the property you could use to identify the mystery salt? (1 point)
2. Explain exactly what you would do. Another person should be able to perform your test by following your procedure. Do not bother with why you are doing these steps. Just tell me exactly what to do to perform this test. Hint: Do NOT include any discussion of your results. Save that for #3. (2 points)
3. How would your results identify the mystery salt? Hint: What exact results would indicate KNO3? What results would indicate KCl? (2 points)

Name:
Answers
1 (Property):
2 (Procedure):
3 (Results):

Answers

Answer 1
1 property

2 procedure

Results

Related Questions

word equation for Na2O+H2O → NaOH

Answers

Answer:

Sodium oxide + Water - - - > Sodium Hydroxide.

I feel sad when all the flowers

Answers

Answer:

find happy things to think about, stay strong xx

Answer:    sorry u feel sad. y u feel sad?

Explanation:

We can talk if u want..

A 1500 N force gives an object an acceleration of 3 m/s2.

What is the mass of the object?

Answers

Answer:

500kg.

Explanation:

Newton's Second Law relates force, mass and acceleration to one another through the equation:

F = ma

We can rearrange this equation algebraically to solve for mass:

m = F/a

Substituting our known values for the variables, we get:

m = 1500N/3m/s2

So mass of the object is 500kg.

We know it's kg because Newtons (N) are a unit defined as 1 kg/m/s2, so m/s2 cancels out when we divide :)

What temperature does neon condensate?

Answers

Answer and Explanation:

I believe −246.048 C or −411 F

Which statement best describes the effects chemicals may have on the
environment?
A. The effects of chemicals on the environment are easy to observe.
B. Some chemicals may help the environment.
C. All chemicals harm the environment.
D. Chemicals must be released in large amounts to affect the
environment.

Answers

The answer is B. So yeah

What is the charge on an atom after it gains two electrons during the formation of a bond?
One negative charge
One positive charge
Two negative charges
Two positive charges

Answers

two negative charges because electrons have a negative charge

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Answer:

hhhhdhabbjdksdalitkslhbdlqhbdndnvlirladiksha pokgjwnfkfdiksha pokhrel shhddhhgkd

Which of the following is a true statement about bacteria, based on what Tim and Moby explained??

A: Bacteria exist in only a few environments on Earth.
B: Bacteria can grow to extremely large sizes.
C: Mast bacteria are harmful to humans
D: Bacteria can be both harmful and helpful to humans.

Extra points for help

Answers

I believe it’s D

There is good and bad bacteria that can be both harmful and good for humans

Answer:

D: Bacteria can be both harmful and helpful to humans.

Explanation:

Hope this helps

2. Hydrocarbons consist of carbon and hydrogen. 5.7 g of a hydrocarbon contains 4.8 g of carbon.
If the relative molecular mass of the hydrocarbon is 114, determine its molecular formula.​

Answers

Answer:

The molecular formula of the hydrocarbon compound is C₈H₁₈

Explanation:

The type of chemical substance in the question = Hydrocarbon

The mass of the hydrocarbon = 5.7 g

The mass of carbon in the given hydrocarbon (sample) = 4.8 g

The relative molecular mas of the hydrocarbon = 114 g

Therefore, the mass of hydrogen in the sample, H = 5.7 g - 4.8 g = 0.9 g

The ratio of the mass of carbon in the sample = 4.8/5.7

The ratio of the mass of hydrogen in the sample = 0.9/5.7

By the law of constant composition, we have;

The mass of carbon in a mole of the hydrocarbon = (4.8/5.7) × 114 g = 96 g

The molar mass of carbon, C = 12 g/mol

The number of moles of carbon in a mole of the hydrocarbon, 'n₁', is given as follows;

n₁ = 96 g/12 g = 8 moles

The mass of hydrogen in a mole of the hydrocarbon = (0.9/5.7) × 114 g = 18 g

The molar mass of hydrogen, H ≈ 1 g/mol

The number of moles of hydrogen in a mole of the hydrocarbon, 'n₂', is given as follows;

n₂ = 48 g/1 g = 18 moles

Therefore, in each each molecule of the compound, we have have 8 atoms of carbon, 'C', and 18 atoms of hydrogen, 'H'

Therefore, we get;

The molecular formula of the hydrocarbon compound is C₈H₁₈ which is the chemical formula for the hydrocarbon also known as octane

Freezing and thawing water can cause a rock to break down into smaller pieces. Which part of the rock cycle is this an example of?

melting
weathering
subsidence
deposition

Answers

Answer:

Deposition

Explanation:

It’s breaking down the rock :]

Answer:

deposition

Explanation:

Ap3x

the following punnett square shows a cross between two hybrid flowers. if the flowers show incomplete dominance, what fraction are pure red? I NEED HELP PLZ!

Answers

Answer:

1/4

Explanation:

Incomplete dominance is when the dominant ("R") gene is not completely dominant and cannot fully mask or cover the recessive ("r") gene. This means that it will result in both genes expressing and a mix of traits appearing. In the case of a flower with "R" genes for red and "r" genes for white, the following possibly combinations exist:

RR = all red, no white "r" gene

Rr = pink, as both the "R" and "r" genes are expressed

rr = white, no red "R" gene

The Punnett Square shows that only one of the four phenotypes is RR and red.

I think it’s 1/4!!!!

How many moles of I2 are in 8.23 moles of NaI ?

Answers

Answer: 4.12

Explanation:

we know that the given mol is 8.23 mol and they are 2NaI and I2 so we will write the equation like this.

8.23mol NaI x 1mol of I2 ÷ 2molNaI = 4.115≅ 4.12 mol of I2

we placed NaI at the bottom to cancel out with the 8.23 mol of NaI

True or False: The reactants and the products of a chemical equation always have the same number of atoms.

Answers

Answer: True

Explanation: It always has the same number because the both have or are using the same product.

How many grams of Sulfur are there in 2.05 x 10^25 molecules of Calcium Sulfate?

Answers

Answer:

1090 grams Sulfur (3 sig-figs)

Explanation:

Given 2.05 x 10²⁵ molecules CaSO₄ => 2.05 x 10²⁵ Sulfur atoms (subscript = 1 mole).

Converting 2.05 x 10²⁵ sulfur atoms to moles, divide by Avogadro's Number

(= 6.023 x 10²³ sulfur atoms / mole sulfur) => 2.05 x 10²⁵ sulfur atoms/6.023 x 10²³ sulfur atoms/mole sulfur atoms = 34.036 moles sulfur atoms.

Converting 34.036 moles sulfur to grams sulfur multiply by formula wt. of sulfur (=32g/mole S)

=> 34.036moles S x 32g/mole S = 1089.158 grams S ≅ 1090 g S (3 sig-figs)

Please help! Is hot tea with lemon juice a heterogeneous, homogeneous, or pure substance? Will award brainliest!

Answers

Answer:

Homogeneous

Explanation:

Pure substances are untouched substances.

Homogeneous mixtures are in uniform.

Heterogeneous mixtures are un-uniform.

A small cart with a mass of 3.0 kg is accelerated from rest and obtains a final velocity of 24 m/s, East in 8.0 s. If friction is neglected, what net force is applied.

a
24 N
b
8.0 N
c
72 N
d
9.0 N

Answers

Answer:

A.

Explanation:

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How can changing the reaction conditions influence the yield of a chemical reaction?
please explain in detail

Answers

I’m not sure if this is what you’re looking for, but if the environmental conditions change, it can be impacted. If it’s humid, for example, the reaction can be subdued and you can have a lower percent yield. (In this situation, a chemical not being stored too well could cause it to react a bit with some water in the air before the experiment)

Answer:

I found this on the web hope this helps.  

Explanation:

Le Châtelier's Principle states that a change in pressure, temperature, or concentration will push the equilibrium to one side of the chemical equation. So, if you manipulate the conditions to favor the product side, you increase the yield and vice versa.

Show work please ?...........

Answers

Answer:

NO

Explanation:

NO NO NO

i am way to much of an idiot for this (hope i made you laugh (and mad cuz i did not answer) :3)

Please help pretty please

Answers

Answer: Its is a field generated by any two objects touching each other.

                                                         OR

Answer: Its is a field generated by any object with any mass.

Explanation: I AM SOOOO SORRY if i get it wrong i pretty sure the first one is right i mean like My first ansewr i typed in......... :/ :/

The answer is B it has to be !

Can anybody do this?

Answers

Answer:this should be c

Explanation:

C7H6O3+ C4H6O3=C9H8O4+H20
- Balance the above equation.​

Answers

Answer:

2C7H6O3 + C4H6O3 - - - > 2C9H8O4 + H2O

Explanation:

Reactants:

2C7H6O3 + C4H6O3

C = 18

H = 18

O = 9

Products:

2C9H8O4 + H2O

C = 18

H = 18

O = 9

Nitrogen gas reacts with hydrogen gas to produce ammonia according to the following equation.

N2(g)+3H2(g) → 2NH3(g)
What is the mole of ammonia produced from 7.23 x 10−4 moles of the hydrogen reactant, assuming there is sufficient nitrogen to react?


7.23 x 10−47.23 x 10−4

8.42 x 10−38.42 x 10−3

4.82 x 10−44.82 x 10−4

4.83 x 10−3

Answers

Answer:

4.82 x 10^-4

Explanation:

7.23 x 10^-4 mol H2   l    2 mol NH3

------------------------------------------------------- =  

                                   l    3 mol H2

(7.23 x 10^-4) x 2   /  3 =

4.82 x 10^-4

Hope this helped! ;)

The mole of ammonia produced from 7.23 x 10⁻⁴ moles of the hydrogen reactant when there is sufficient nitrogen to react is 4.82×10⁻⁴.

What is moles?

Moles is a unit which is used to estimate the amount of any substance and it is represented as:
n = W/M , where

W = given mass

M = molar mass

Given chemical reaction is:
N₂(g) + 3H₂(g) → 2NH₃(g)

In the question it is given that sufficient moles of N₂ is present, so the formation of product depends on the moles of H₂. From the stoichiometry of the reaction, it is clear that:

3 moles of H₂ = produce 2 moles of NH₃

7.23×10⁻⁴ moles of H₂ = produce 2/3 × 7.23×10⁻⁴=4.82×10⁻⁴ moles of NH₃

Hence, option (C) is correct i.e. 4.82×10⁻⁴.

To know more about moles, visit the below link:
https://brainly.com/question/1464305

True or false: Equal but opposite forces pushing on the same object produce a net force of zero on the object.

Answers

Answer:

true.................

Answer:

the answer is true hope it helps

9. What does C12 (g) represents?
A. Chlorine ions
B. Chlorine liquid
C. Chlorine gas
D. Chlorine atom​

Answers

Answer:

chlorine gas since it exists as a diatomic molecule

How many total atoms in 5 mg(NO3)2

Answers

Answer:

5 Mg (magnesium), 2 N (nitrogen), and 6 O (oxygen) -- total of 13 atoms

There are 45 as 1 mg(NO3)2 = 9 atoms.

100 point and brainlist answer the question below

Answers

Answer:

a

Explanation:

because am pro

How many ions are in the following compounds?
a. (NH4)3PO4 =
b. NaCl =

Answers

Answer:

A- In (NH4)3PO4  there are four ions in total as three ions of NH₄ and is one ion of PO₄

An atom will be neutral if which of the following are true of its arrangement of subatomic particles?

The number of its protons is equal to the number of its electrons
All of its electrons orbit its nucleus at exactly the same distance
The sum of the atom's protons and neutrons is greater than zero
The nucleus of the atom contains more neutrons than anything else

Answers

Answer will be a the number of its protons and on and on

Pleaseeee help pretty please

Answers

Answer:

A object made from iron .

Explanation:

I believe the answer is any object made up of iron since iron has a strong reaction to magnets so it must have a strong connection with the magnetic field

I need helps plss!!!!

Answers

Answer:

Copper = 2 Boron = 12 (copper and boron combined = 14)

Explanation:

the number after the element is the amount of atoms there is

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How does the author of "Solar-Powered Public Buildings? Not So Fast, California!" support the claim that an increase in solar power usage could disrupt power delivery to individuals and organizations? pls answer both parts:part 1:What is the perimeter of this figure to the nearest whole unit?part:2What is the area of this figure to the nearest whole square unit? Which one of the following is the reason that bonds may sell at a discount or premium?A. The market yield rate fluctuated between the time the bond agreement was written and the date the bonds were actually issued to investorsB. Market conditions caused the coupon rate of interest to change between the time the bond agreement was written and the date the bonds were actually issued to investorsC. The bond issuer failed to consider the market yield rate when the bond agreement was createdD. The bond issuer adjusted the coupon rate to match that of other bond issues please do as many as you can What is an equation of the line that passes through the point (1,3) and is parallel to the line 4x-y=2? What volume of a 0.100 M AgNO3 solution is required to completely react with the CaCl2 in 3.00 L of a 0.100 M CaCl2 solution? The balanced chemical equation is: 2 JUpper A g upper N upper 0 subscript 3 plus upper C a upper C l subscript 2 right arrow 2 upper A g upper C l plus upper C a (upper N upper O subscript 3) subscript 2. L AgNO3 Jorge has $150 in his savings account. He earns $33 a week mowing lawns. If Jorge saves all of his earnings, after how many weeks will he have$437 saved? How much work is done when a porcelain vase with mass of 2.5 kg is lifted up 3 m to a shelf? (HINT- Weight can be used as Force when the motion is up/down). Question ProgressHomework Progress7/21 Marksa) Work out (8 * 109) * (2 10)Give your answer in standard form.b) Work out (6 * 102) = (3 x 10-6)Give your answer in standard form. PLEASE CLICK ON THIS IMAGE I NEED HELP Select all the expressions that are equivalent to 10x + 4 - (6x - 1) Give me two reasons why should we be treated the same? WhAt is it really like to live off 1 dollar a day from Patrick Henrys speech to the Virginia ConventionThe sentence Suffer not yourselves to be betrayed with a kiss (paragraph 1) serves all the following purposes EXCEPT toA.elevate the importance of the speakers causeB.indicate a shift in point of viewC.remind the audience of British trickeryD.reiterate the idea presented in the previous sentenceE.disparage the current British actionsPlease select the best answer from the choices providedABCDE MUSIC QUESTION. PLEASE DONT USE ME FOR POINTS, IF U TAKE MUSIC CLASSES PLEASE HELP!. also ignore my answer, I guessed HELP PLEASE! MULTIPLE CHOICE1. A species of beetle can be either black or brown in color. The beetle's color is determined by a single gene, and black is recessive to brown. The soil in the area has become darker and closer in color to the black beetles. Which of the following will most likely occur?Selective pressures will decrease the number of brown beetles.Selective pressures will increase the number of brown beetles.Selective pressures will decrease the number of black beetles.The overall size of the beetle population will continue to decrease over time.2. Coral snakes are brightly colored, highly venomous snakes with red, yellow, and black bands along their bodies. Another species of snake, called the scarlet king snake, has similar bands of red, black, and yellow. Which of the following describes the conditions that resulted in a large population of king snakes with these types of markings? King snakes and coral snakes relied on similar food sources that contributed to their unique coloring.Since king snakes with these markings were avoided by predators, they were able to survive to pass on this trait to offspring.Coral snakes mated with king snakes often enough to produce another species of king snake with the red, black, and yellow.Overproduction of offspring increased the likelihood that the genetic mutation leading to these bands would spontaneously occur. Attempt if smart please helpHow many ways are there to form a 4-digit odd number using the digits3, 4, 5 and 8 without repeating the digits in each number? Please help me ASAP!!!! If the defendant fails to answer a complaint, the judge may decide to issue a _____.a.Civil settlementb.Default judgmentc.Summary judgmentd.None of the above Which theory directlycontradicts the concept ofabsolute zero?A. Gravitational TheoryB. Kinetic TheoryC. Matter Theory