Molarity Homework

Molarity: Describe how many liters of water and how many grams of the following chemicals you need to add to make the following solutions

(See p. 412-415 in chapter 13 for help with these molarity problems)

1. Make 6.00L of a 5.60M solution of Copper (II) Sulfate

2. Make 1.50L of a 1.25 x 10³M solution of Aluminum Nitrate

3. Make 8.52L of a 1.00M solution of Sodium Hydroxide

4. Make 300.0mL of a 2.58M solution of Magnesium Chloride

5. Make 800.0mL of a 2.87 x10^-5M solution of Calcium Phosphate

6. Make 1000.0mL of a 5.97 x 10^-3M solution of Sodium Chloride

7. Make 1.00L of a 4.56 x 10^-3M solution of Copper (II) Sulfate

8. Make 6.00L of a 3.67 x 10^-3M solution of Barium Hydroxide

9. Make 80.0 mL of a 2.45 x 10^-3M solution of Aluminum Hydroxide

10. Make 15.0 mL of a 3.56 x 10^-3M solution of Sodium Chloride

Molarity: Making molarities from stock solutions (sample problem 13-2 on p. 414 will help somewhat with these problems. DRAW THEM FIRST, IT HELPS!)

1. Make 1.00 L of a 6.00 M solution of HCl from a stock solution of 12 M

2. Make 4.00 L of a 6.00 M solution of HCl from a stock solution of 15 M

3. Make 400. mL of a 5.00 M solution of HCl from a stock solution of 12 M

4. Make 600. mL of a 4.90 M solution of HCl from a stock solution of 8 M

5. Make 350. mL of a 8.00 M solution of HCl from a stock solution of 12 M

6. Make 3000. mL of a 5.05 M solution of NH₃ from a stock solution of 10 M

Answers to molarity problems

1. 5.38 x 10³g 7. 0.728g

2. 3.99 x 10⁵g 8. 3.77g

3. 3.41 x 10²g 9. 0.0153g

4. 73.5g 10. 0.00312g

5. 7.11 x 10^-3g

6. 3.49 x 10^-1g

Answers to stock solution problems

HCl H₂O

1. 0.5L 0.5L

2. 1.60L 2.40L

3. 0.167L 0.233L

4. 0.368L 0.233L

5. 0.233L 0.117L

6. 1.52L 1.49L