Molarity and Dilutions

The term molar, which describes a solution's concentration, is written as?

• M

• mol

• g

• g/L

You need to make 200 mL of a 0.20 M aqueous solution of sodium chloride. The only available solution is 1.0 M. Determine how to make the needed dilution.

• Add 160 mL to the initial volume

• Add 160 grams to the initial volume

• Evaporate 160 mL from the initial volume

• the experiment cannot be conducted with the materials provided

Tags

NGSS.HS-ETS1-2

A dilution is when

• solute is added to the volume of stock solution

• water is added to the volume of stock solution

• solute is removed from the volume of stock solution

• water is removed from the volume of stock solution

Calculate the grams of NaOH present in 10.0 mL of a 2.0 M NaOH solution.

• 0.8 grams

• 2000 grams

• 0.3 grams

• 5 grams

Tags

NGSS.HS-PS1-7

You need to make 200 mL of a 0.20 M aqueous solution of sodium chloride. The only available solution is 1.0 M. Determine how to make the needed dilution.

• Add 160 mL to the initial volume

• Add 160 grams to the initial volume

• Evaporate 160 mL from the initial volume

• the experiment cannot be conducted with the materials provided

What volume, in milliliters, of 10.0 M NaOH is needed to prepare 300 mL of 2.00 M NaOH by dilution?

• 0.067 mL

• 60.0 mL

• 100 mL

• 125 mL

How many liters 0.110 M nitric acid can be prepared by diluting 5.00 mL of 15.3 M stock solution?

• 1530 mL

• 1.53 L

• 0.0654L

• 0.153 L

Tags

NGSS.HS-PS1-7

What is the formula for molarity?

• moles/grams
• moles/kilograms
• moles/milliliters
• moles/liters

How many L are in 45 mL of a solution?

• 450
• 45000
• 4.5
• 0.045

Determine the molarity of 2.25 mole of sulfuric acid, H₂SO₄, dissolved in 725 mL of solution.

• 322.2 M
• 3.1 M
• 0.32 M
• 2.25 M