Molarity

Vocab

100

(20s)What is the name given to a substances ability to dissolve in a solvent.

Solubility

200

(20s)What is the number of moles of a solute dissolved per liter of solution

Molarity

300

(20s)A solution has a small amount of solute dissolved but more CAN dissolve. The solution is said to be _________

Unsaturated

400

(20s)What is the name given to the substance that gets dissolved in a solution?

Solute

500

(20s)What is the equation for dilution of a solution?

M1V1=M2V2

Molarity Calcs

100

(60s)How many moles of solute are present in 1.50 L of 0.240 M Na₂SO₄

mm=119.05 g/mol

0.360 moles

(molar mass is unnecessary in this problem)

200

(60s)A Saline solution contains .90 g NaCl in 100. mL of solution, what is the molarity of the solution?

mm=58.44 g/mol

0.15M

300

(60s)You dissolve 30.0 g NaCl in 1.50 L water. What is the molarity of this solution?

First team correct gets triple points!

mm=58.44 g/mol

0.342 M

400

(60s)What mass of CaCl₂ is needed to make 250. mL of 2.0M solution

mm=110.98 g/mol

55 g

500

(60s)How many mL of 1.25 M solution can be made using 8.0 g NH₄NO₃?

mm=80.06 g/mol

80. mL

Misc.

100

(20s)You dilute a solution by adding water. Does the number of moles of solute increase, decrease, or remain the same?

Remains the same

200

(20s)You add water to a solution. Does the concentration increase, decrease, or remain the same?

Decrease

300

(20s)You evaporate a solution. Does the concentration increase, decrease, or remain the same?

Increase

400

The molarity of a 6.0 L solution increases by 3x by evaporating water. How much water is left in the solution?

2.0 L

(If molarity increases by 3x, the volume decreases by 3x)

500

(20s)As you increase the independent variable, the dependent variable also increase. This is known as a ________ relationship.

Direct

Make sure you know that as one variable increases, the other decreases is known as inverse.

M1V1=M2V2

100

(30s)You start with 10.0 L of a 5.0 M solution. You add water until the final volume is 50.0 L. What is the new concentration?

(Triple points to the first team in correctly)

1.0 M

200

(40s)You want to make 1.2 L of a 2.0 M solution. What volume of the 6.0 M solution must you use to dilute?

0.40 L

300

(60s)You add 300. mL of water to 200. mL of a 10.0 M solution. What is the molarity of the final solution?

4.00 M

400

(60s)How many milliliters of a solution of 2.00M MgSO₄ would you need to prepare 120. mL of .400M MgSO₄

24.0 mL (watch sig figs!)

500

(60s)How much water must be added to 50.0 mL of 4.00M KI to make 1.00 M KI?

150. mL or 0.150 L water added

(Needs to have a final volume of 200. mL)