5-15 Calculate molarity of solutions and of ions in solution

5-15-1. What is the molarity of a solution if a 2.0 L sample contains 3.0 mol NaOH?
A. 1.5 M, B. 0.67 M, C. 6.0 M

5-15-3. What is the molar concentration of chloride ions in 0.30M BaCl₂?
A. 0.30M, B. 0.15M, C. 0.60M, D. 0.20M

5-15-4. What is the molar concentration of sodium ions in a solution that is 0.20M in NaCl and 0.30M in Na₂SO₄?
A. 0.50M, B. 0.25M, 0.70M, 0.80M

5-15-5. A solution is prepared by mixing 10.0 mL of 0.100M NaNO₃, 20.0 mL of 0.300M Ca(NO₃)₂, and enough water to bring the total volume up to 50.0 mL. What is the molar concentration of nitrate ions in the resulting solution?
A. 0.200M, B. 0.260M, C. 0.130 M, D. 0.700 M

5-15-JJW. What is the molarity of a solution of 15.0 g of lithium perchlorate in 4.50 x 10² mL of water?

A. 0.0634 M
B. 0.313 M
C. 3.54 M
D. 63.4 M