Molarity / Dilutions

How many moles of NaCl are present in a solution with a molarity of 8.59M and 125 mL of solution?

• 1.17 gram

• 62.7 mol
• 1.07 mol
• 62.7 grams

What is the molarity of 4 grams of KNO₃ in 3.8 L of solution?

• 0.01 M

• 0.02 M

• 1.05 M

• 1.08 M

What is the molarity of 3 mole of hydrochloric acid in 3 L of water. 

• 3
• 1
• 6
• 9

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

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

• 27.8 mL

• .278 mL

• 2.8 mL

• 278 mL

If 2.5 L of a 4M solution of FeCl₃ is diluted to a volume of 6 L by the addition of water, what is the molarity of the diluted solution?

• 2.5 M

• 4.17 M

• 6.25 M

• 1.67 M

1.     If a chemist starts with 25 mL  of 6M HCl and prepares a new solution with a concentration of 0.5M, what with be the new volume?

• 200 mL

• 500 mL

• 300 mL

• 400 mL

A chemist dilutes 25 mL of a 2M solution to make 500 mL of new solution.  What is the molar concentration of the new solution?

• 0.1 M

• 0.2 M

• 0.5 M

• 1.0 M

Which of the following is the Dilution Formula?

• V₁M₁ = V₂M₂

• M = m/V

• V = mT

• PV = nRT

What volume, in milliliters, of 10.0 M NaOH is needed to prepare 300.0 mL of 2.00 M NaOH by dilution?

• 0.067 mL

• 60.0 mL

• 100 mL

• 125 mL