concentration and dilution calculations

What is the molarity of a solution in which 58 g of NaCl are dissolved in 1.0 L of solution?

• 100 M

• 1.5 m

• 1.0 M

• 1.0 m

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

• 1.07 gram
• 62.7 mol
• 1.07 mol
• 62.7 grams

Tags

NGSS.HS-PS1-7

What is the molality of 1.2 g of HCl in 750 g of solution?

• 0.040 m

• 0.000040 m

• 0.0016 m

If the percent by volume is 2.0% and the volume of solution is 250 mL, what is the volume of solute in solution?

• 0.5 mL
• 1.25 mL
• 5.0 mL
• 12.5 mL

If the percent (mass/mass) for a solute is 4.0% and the mass of the solution is 200. g, what is the mass of solute in the solution?

• 8.0 g
• 50. g

• 80. g

• 800. g

How many grams of AgNO₃ (MM = 169.87) are needed to prepare 0.125M solution in 250 mL of water? 

• .03g
• 0.5g
• 5.3g
• 84.9g

Tags

NGSS.HS-PS1-7

When you make a dilution, which of these values remains constant?

• The molarity (M)

• The total moles of solute

• The volume (V)

• The concentration

50.0 ml of a 1.00 M solution is diluted until the final volume is 80.0 ml. What is the new concentration?

• 8.00 M

• 0.500 M

• 0.625 M

• 1.60 M

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

If you have 34 mL of a 0.5 M NaBr solution, what will the concentration be if 56 mL of water is added to it?

• .188 M

• 3.78 M

• .389 M

• 1.76 M