Molarity Dilutions

How many moles are needed to make 2.5 L of a 3.8 M solution? 

• 9.5 mol
• 0.66 mol
• 1.5 mol
• 15 mol

What is the concentration of a solution that has a volume of 2.5 L and contains exactly 2.125 moles of Ca₃(PO₄)₂?

• 264 M
• 0.85 M
• 3.7 M
• 2.0 M

How many liters of 0.88 M solution can be made with .968 moles of lithium fluoride? 

• 0.87 L
• 29 L
• 1.1 L
• 0.46 L

How many moles of CuF₂ are needed to make 6.7 liters of 1.2 M solution?

• 7.0 moles
• 5.6 moles
• 660 g
• 8.04 moles

You have a 0.5 M MgSO₄ stock solution available.  Calculate the volume of the stock solution needed to make 2.0 L of 0.20 M MgSO₄.

• 0.8 L
• 5 L 
• 0.1 L
• 0.5 L

If I add water to 100.0 mL of a 0.15 M NaOH solution until the final volume is 150 mL, what will the molarity of the diluted solution be?

• 0.23 M
• 0.10 M
• 1.0 x 10⁵ M
• 1.0 M

Calculate the molarity of the following solution:  1.0 moles of KCl in 750.0 mL of solution.

• 0.750 M
• 99 M
• 1.3 M
• 2.0 M

What is the volume (in liters) of a 0.20 M solution that contains 0.30 moles of Na₂SO₄ dissolved in it?

• 1.5 L
• 0.060 L
• 0.67 L
• 2.3 L

How many moles of FeBr₃ are required to make 2.25 L of 1.45 M solution?

• 3.26 moles
• 296 moles
• 963 moles
• 96.3 moles

How much 1.50M KBr can be made from 15.6 mL of concentrated KBr with a molarity of 9.65 M?

• 150. mL
• 151 mL
• 1.00 L
• 100. mL