Molarity Problems Worksheet With Answers (Page 2 of 2) in pdf

Molarity Problems Worksheet With Answers Page 2

Dilution Problems Worksheet

1. How do you prepare a 250.-ml of a 2.35 M HF dilution from a 15.0 M stock solution?

2. If 455-ml of 6.0 M HNO

is used to make a 2.5 L dilution, what is the molarity of the

dilution?

3. If 65.5 ml of HCl stock solution is used to make 450.-ml of a 0.675 M HCl dilution, what is

the molarity of the stock solution?

4. How do you prepare 500.-ml of a 1.77 M H

dilution from an 18.0 M H

stock

solution?

Answers:

1. 39.2-ml (Put in paragraph form)

2. 1.1 M

3. 4.64 M

4. 49.2-ml

Take 49.2-ml of 18.0 M H

stock solution and pour it into a 500-ml volumetric flask.

Fill to the 500-ml line with distilled water to make 1.77M H

solution.

Extra Molarity Problems for Practice

1. How many moles of LiF would be required to produce a 2.5 M solution with a

volume of 1.5 L?

2. How many moles of Sr(NO

)

would be used in the preparation of 2.50 L of a 3.5 M solution?

3. What is the molarity of a 500-ml solution containing 249 g of KI?

4. How many grams of CaCl

would be required to produce a 3.5 M solution with a

volume of 2.0 L?

Answers:

1. 3.75 M

2. 8.75 M

3. 3.00 M

4. 7.8 x 10

Molarity Problems Worksheet With Answers Page 2