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Total questions: 10
Worksheet time: 8mins
Name
Class
Date
1.
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
2.
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
3.
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?
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
4.
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?
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
5.
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?
used?
a)
molarity formula
b)
dilution formula
c)
both will work
d)
neither will work
6.
Which of the following would result in being able to dissolve a greater amount of gas in a
solution?
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
7.
90 grams of sodium nitrate (NaNO3) are put into 100 grams of water and stirred. The final
mixture has a temperature of 20°C. About how many grams of the sodium nitrate dissolved?
mixture has a temperature of 20°C. About how many grams of the sodium nitrate dissolved?
a)
23
b)
73
c)
80
d)
88
8.
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?
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.
9.
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
10.
Which of the following is the best way to determine if an aqueous solution is supersaturated?
a)
add more solvent
b)
measure the temperature
c)
filter out excess solute
d)
add a seed crystal
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