Question

1. What is the molar mass of Ba(OH)₂? 

1. 1. 171.342 mol/L

   2. 711.243 mol/L 

   3. 117.432 mol/L 

   4. 155.342 mol/L

2. What is the molar concentration of the hydroxide ion (OH^-) in an aqueous solution of 1.50 M Ba(OH)₂ solution? 

1. 1. 1.50 mol/L 

   2. 3.50 mol/L 

   3. 3.00 mol/L 

   4. 4.00 mol/L 

3. What is the molar concentration of the barium ion (Ba²⁺) in an aqueous solution of 1.50 M Ba(OH)₂ solution? 

1. 1. 1.50 mol/L 

   2. 3.50 mol/L 

   3. 3.00 mol/L 

   4. 4.00 mol/L 

4. What is the concentration of a diluted solution made from 50.00 mL of 0.500 M stock solution diluted with enough water to make 200.00 mL of the diluted solution? 

5. 1. 0.375 M 

   2. 0.250 M 

   3. 0.0625 M 

   4. 0.125 M