Test Review 1
Test Review 2
Test Review 3
Test Review Calculations & Short Answers
100
What is the definition of a solute?
The substance that is dissolved
100
Which of the following mixtures would you use a magnet to separate?
Iron filings from sand
Table salt from water
Pollen from air
iron filings from sand
100
Name an example of a suspension
muddy water, chalk and water, dusta particles
100
How much sugar is in 155 g of a sugar solution that is 12.5% sugar by mass?
19.38g
200
The definition of a solvent is...
The substance that is doing the dissolving
200
What is the definition of a dilute solution?
One that has a relatively small amount of solute particles dissolved in it
200
Name an example of a colloid
whipped cream, mayonnaise, fog
200
What is the molarity of a solution made by dissolving 0.22 mol of MgCl2 in enough water to make a 168 mL solution?
.0013 M
300
Is this solution a heterogeneous or homogeneous mixture?
homogeneous
300
According to the graph, what is the solubility of CaCl2 in 100 g of water at 20° C?
about 80 g
300
What is the percent by volume of a solution made by mixing 125 mL of ethanol with enough water to form 1245 mL of solution?
10%
300
What is the Tyndall effect?
The scattering of light by the particles in a colloid
400
Is this a homogeneous or heterogeneous mixture?
heterogeneous mixture
400
According to the graph what happens to the solubility of KCl as temperature increases?
solubility increases
400
Calculate the percent by mass of 160 g of a solution that contains 95 g of solvent.
40%
400
Why does increasing the surface area of a solute speed up the dissolving process?
By increasing the surface area, more solute particles are exposed to solvent particles
500
Is the following a heterogeneous or homogeneous mixture?
homogeneous mixture
500
Calculate the mass of solution prepared when 35.8 g of solute is used to make a 12.7% solution.
281.9 g
500
How many grams of salt should be added to 80 g of water to make a 10.5% salt solution?
8.4g
500
Why does the definition of solubility include the temperature?
Solubility changes with temperature; therefore, a solubility value is valid only at a particular temperature