Dilutions

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

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

Which is the most dilute solution?

• 4M NaOH

• 0.5M NaCl

• 1M KCl

• 1.5M HCl

What is the concentration, in percent by volume, of 15.3 mL of solute in 2.65 L of solution?

• 0.58%

• 0.0058%

• 5.8%

What mass of water should be added to 22.0 g of KCl to make 5.50% by mass solution?

• 400 g

• 25 g

• 0.25 g

You can make a solution more concentrated by adding __________.

• solute

• solvent

• water

• liquid

• none are correct

Tags

NGSS.HS-PS1-5

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

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

What mass of solute is needed to make 75.0 g of a 3.4% solution?

• 2.55 g

• 22 g

• 0.05 g

• 5.0 g

• none are correct