Chemistry Solutions Quiz Review (Acids and Bases)

Solute

Dissolved Substance (EX: Kool Aid Powder)

Solvent

Liquid Substance (EX: Water)

Solution

Solute + Solvent

Unsaturated

Low concentration, light color, weaker

Saturated

Darker color, some undissolved

Super Saturated

Unstable, crystals, strongest

Dilution

High to low concentration

Stock Concentration

M1

Stock Volume

V1

Dilution Concentration

M2

Dilution Volume

V2

If you had 16 mL of a 10 M diluted solution, and knew that you started with 8 mL of your stock solution. What was the Molarity of your starting stock solution?

8 x M = 16 × 10 M = 20 M

If you had a 12 M (Molar) stock solution and made 18 mL of a diluted 9 M solution. What volume of your stock solution did you start with?

12 x V = 18 × 9 V = 13.5 mL

What is the molarity of a solution that has .75 moles of a solute dissolved in 2.5 liters of solution?

M = .75 / 2.5 = .3 M

What is the volume of a .400 M solution made with .750 moles of Kl?

.4 = .750 / x x = 1.88 L

What is the volume of a 1.25 M solution made with 258 grams of Kl?

258 g / X mol = 166 / 1 mol x = 1.55 mol

If you dilute 175 mL of 1.6 M solution of LiCl to 1.0 L, determine the new concentration of the solution.

M1V1 = M2V2

1.6 × 175 = M2 × 1000 M2 = 0.28 M

What is the molarity of a solution containing 0.25 moles of NaCl in 500 mL of solution?

Convert mL to L: 500 mL x 1000 mL = 0.5 L

Molarity = moles / Liters: 0.25 moles / 0.5 L = 0.5 M

You have a 2.0 M stock solution. How many milliliters of the stock solution are needed to prepare 100 mL of a 0.50 M soltution?

2 x V1 = 0.50 × 100 V1 = 25 mL

How many grams of potassium carbonate are needed to make 200 mL of a 2.5 M solution?

69.1 grams

How many liters of 4 M solution can be made using 100 grams of lithium bromide?

3.47 L

How many grams of ammonium sulfate are needed to make a 0.25 M solution at a concentration of 6 M?

171.2 grams

How many grams of copper (ll) fluoride are needed to make 6.7 liters of a 1.2 M solution?

1081.4 grams

How many liters of a 0.75 M solution can be made with 75 grams of lead (ll) oxide?

12.6 grams

What is the concentration of a solution with a volume of 9 mL that contains 2 grams of iron (lll) hydroxide?

2.08 M