Molarity and Dilutions Honors

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

• .304 M

• 1.76 M

Molarity is ...

• grams of solute/deciliters of solvent.

• grams of solute/liters of solution.

• moles of solute/liters of solution.

• moles of solute/milliliters of solvent.

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

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

• 27.8 mL

• 27.78 mL

• 2.8 mL

• 278 mL

Which of these is the CORRECT equation for solving for Molarity?

• M = mol / mL

• M = mol / L

• M= mL / mol

• M = L / mol

If 0.825 liters of solution contains 0.025 moles of CaCl₂, what is the molarity of the solution?

• 33 M

• 0.03 M

• 30.3 M

• 3.03 M

 A teacher starts with 0.250 L of a 0.0150 M HBr solution and dilutes it to 0.750 L. What is the concentration of HBr in the new solution?

• 0.005 M

• 0.045 M

• 12.5 M

• 7.5 M

Tags

NGSS.HS-PS1-7

What is the molarity of a solution that contains 5 moles of solute in 2 liters of solution?

• 2.5 M

• 5 M

• 10 M

• 0.4 M

If you are given grams of solute, what must you do before you can solve for Molarity?

• divide grams by the formula mass

• multiply grams by the formula mass

• nothing, use grams

• divide the formula mass by the volume

A solution is made by dissolving 0.50 mole of NaCl in enough water to give a final volume of 0.40 L. What is the molarity of the solution?

• 0.10 M

• 0.40 M

• 1.25 M

• 2.33 M