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Solutions OL 23

Total questions: 42

Worksheet time: 1hrs 20mins

Name
Class
Date
1.

Salts that curve upwards on the graph are

a)

solids

b)

gases

c)

liquids

d)

metals

2.
What is a substance that is dissolved in another substance? 
a)
solution
b)
solute
c)
solvent
d)
compound
3.
What is a solvent?
a)
The substance that does the dissolving in a solution.
b)
The substance that is being dissolved in a solution.
c)
The mixing of different substances.
d)
The process in which neutral molecules lose or gain electrons
4.
In the above picture, a powder is about to be poured into the liquid. Which of the following should be done to make this powder dissolve faster?

a)
stir the powder in the liquid
b)
freeze the mixture
c)
add more powder to the liquid
d)
store the mixture in a dark place
5.
Kool-Aid - Powder, sugar, and water
Identify the solvent 
a)
water
b)
powder
c)
sugar
d)
powder and sugar
6.
When Koolaid mix is light colored and tastes watery it is a _______ solution.
a)
saturated 
b)
diluted
7.
When a Koolaid mix in water is dark in color and very sweet it is a __________ solution.
a)
concentrated 
b)
Diluted
8.
How many grams of K2Cr2O7, are soluble in 100 g of water at 95 ºC?
a)
83 grams
b)
75 grams
c)
40 grams
d)
12 grams
9.
Which solute is the most soluble at 10 ⁰C?
a)
KI
b)
KClO3
c)
NH4Cl
d)
NH3
10.
Which solute is the least soluble at 90 ⁰C?
a)
SO2
b)
KClO3
c)
KI
d)
HCl
11.
How does a solution become supersaturated?
a)
dissolve lots of solvent in it.
b)
dissolve a little solute in it. 
c)
dissolve more solute than you should be able to. 
d)
dissolve a super amount of solvent in it. 
12.
When 20 grams of potassium chlorate, KClO3, is dissolved in 100 grams of water at 80 ºC, the solution can be correctly described as:
a)
supersaturated
b)
saturated
c)
unsaturated
13.
When 50 grams of KCl is dissolved in 100 grams of water at 50 ºC, the solution can be correctly described as:
a)
supersaturated
b)
unsaturated
c)
saturated
14.
What is it about the water molecule that makes it a great solvent?
a)
water demonstrates polarity; a partial charge on each side of the molecule
b)
due to its molecular formula
c)
it has a liner molecular shape
d)
due to it's non-polar molecular structure
15.
What is the correct formula to solve for the Molarity of a solution that has .4 moles of HCl in 9.5 L of solution?
a)
M = 9.5 L / .4 mol
b)
M1V1=M2V2
c)
M = .4 mol / 9.5 L
d)
none of the other choices
16.
A sample of 0.0255 mol potassium hydroxide, KOH, was dissolved in water to yield 10.0 mL of
solution.  Which amount would you need to change to solve for molarity?
a)
change .0255 moles to grams
b)
change 10 mL to L
c)
change both values to grams and L
d)
leave it as it is
17.
A questions asks, "what volume of 0.125 M KMnO4 is required to yield 0.180 mol of potassium permanganate,
KMnO4?"  What is the correct formula set up to solve for this problem?
a)
.125 M = .180 mol / L
b)
M1 V1 = M2 V2
c)
.125 M = L / .180 mol
d)
none of the choices listed
18.
Which formula should you use to convert 2.00 L of 0.300 M sulfuric acid, how many mL of a 1.00 M stock solution should be
used?
a)
molarity formula
b)
dilution formula
c)
both will work
d)
neither will work
19.
Which of the following would result in being able to dissolve a greater amount of gas in a
solution?
a)
Heat the gas and solution
b)
Decrease the pressure of the solution
c)
Make the gas an electrolyte
d)
Cool the gas and solution
20.
Students are asked to make statements about the solubility graph above. Which student does
the best job of communicating the general features of the graph?
a)
Most salts require 100 grams of water in order to dissolve completely.
b)
Table salt has the average solubility of all salts.
c)
The solubility of most salts increases with increasing temperature.
d)
Most curves show a decreasing slope as the temperature rises.
21.
Which of the following would decrease the rate of solution when dissolving a solid in water?
a)
Raise the temperature of the solution
b)
Crush the solid before mixing
c)
Stir the solution after mixing
d)
Use a single cube of solid
22.
This solution would be considered
a)
Unsaturated
b)
Supersaturated
c)
Saturated
d)
Undefined
23.
This graph represents a(n) ___ solution
a)
saturated
b)
supersaturated
c)
unsaturated
d)
undefined
24.
What is a substance that is dissolved in another substance? 
a)
solution
b)
solute
c)
solvent
d)
compound
25.
salt water is a 
a)
compound
b)
element
c)
heterogeneous mixture
d)
solution
26.
In this mixture, which of the following will be the solute?
a)
The water in the glass
b)
The glass that holds the final mixture
c)
The solution containing both powder and water
d)
The powder on the spoon
27.

Gases are more soluble at ______temps and _____pressures

a)

high, low

b)

low , high

c)

high, high

d)

low, low

28.

How many mols of HCl are in 3 liters of 2.0M HCl solution?

a)

2.0

b)

1.5

c)

6.0

d)

0.66

29.

In a sample of seawater, the solvent is:

a)

water

b)

sea

c)

salt

d)

air

30.

If I want more sugar to dissolve in water, I should heat the water

a)

true

b)

false

31.

If I want more sugar to dissolve in water, I should stir the water

a)

true

b)

false

32.
What is the molarity of  420 mls of a KCl solution that contains 16.0 grams of KCl
a)
625 M
b)
0.51 M
c)
3.19 M
d)
0.00563 M
33.
Oil molecules are nonpolar. What kind of solvent is required to remove an oil stain?
a)
saturated
b)
unsaturated
c)
polar
d)
nonpolar
34.

You and your friend have a contest to see who can make sweet iced tea the fastest. Which of the following would NOT help you win?

a)

Cooling the water

b)

Using smaller sugar crystals

c)

Heating the water

d)

Stirring quickly

35.
What is the most common solvent in everyday life?
a)
Ethanol
b)
Tuluene
c)
Water
d)
Oils
36.

A curve on the solubility graph that curves downward is a...

a)

gas

b)

solid

c)

liquid

d)

metal

37.

polar substances dissolve ____ substances

a)

polar

b)

nonpolar

c)

unpolar

d)

superpolar

38.

When referring to the solubility of different substances, the phrase "like dissolves like" is often used as a guideline to select an appropriate solvent. The property referenced in "like dissolves like" is the

a)

polarity

b)

mass

c)

size

d)

temperature

39.

A solution containing the maximum amount of solute that is soluble at a given temperature is said to be-

a)

diluted

b)

saturated

c)

unsaturated

d)

supersaturated

40.

What volume of 2.5M NaOH solution contains 3.25 mol of NaOH?

L=mol/M

a)

.098

b)

.575

c)

1.30

d)

1.45

41.

To make 2.00 L of 0.300 M sulfuric acid, how many mL of a 1.00 M stock solution should be used?

a)

150ml

b)

600ml

c)

667ml

d)

1500ml

42.

Mrs. Lammers favorite candy is...

a)

Laffy taffy laugh bites

b)

white chocolate kit kats/reeses.

c)

Trolli sour octopus

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