Molarity and Mass Percent

You are adding a chlorine solution to a swimming pool. The stock solution of chlorine is 1000M. Your swimming pool (75,000 L) needs to be at a concentration of 0.1M. How much of the stock solution should you add?

• 7500 L

• .75 L

• 750 L

• 7.5 L

What is the molarity of a solution made by diluting 26.5 mL of 6.00M HNO₃ to a volume of 250 mL?

• 15.9 M

• 0.636 M

• 0.642 M

• 1.59 M

Determine the molarity. 1.457 mol KCl in 1.500 L of solution

• .9713 M

• 1.0295 M

• 1 M

• .48565 M

Find the molarity of 186.55 g of sucrose, C₁₂H₂₂O₁₁ (MM = 342) in 250 mL of water.

• 2.18 M

• 0.746 M

• 1.18 M

• 0.545 M

How many mL of stock solution of 2 M NaCl do you need to prepare 100 mL of 0.150M NaCl?

• 7.5 mL

• 15 mL

• 1333 mL

• 200 mL

• none are correct

Calculate the Molarity in a solution containing 40.0 g of NaCl dissolved in 500.0 mL of H₂O.

• 0.08 M

• 12.5 M

• 1.37 M

• 0.74 M

• none are correct

If I have 340 mL of a 0.5 M NaBr solution, what will the concentration be if I add 560 mL more water to it?

• .188 M

• 3.78 M

• .389 M

• 1.76 M

• none are correct

How many mL of 10.8 M HCl are required to make 100.0 mL of 3.00 M acid?

• 27.8 mL

• .278 mL

• 2.8 mL

• 278 mL

• none are correct

How many moles of solute are present in 50.0 mL of 0.20 M KNO₃?

• 10.0 moles solute

• 0.05 moles solute

• 1.00 moles solute

• 0.01 moles solute

• none are correct

What is the molarity of 4 grams of sodium chloride (NaCl) in 3,800 mL of solution?

• 0.018 M

• 0.018 m

• 1.052 M

• 1.052 m

• none are correct