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

• The molarity (M)

• The total moles of solute

• The volume (V)

• The concentration

Tags

NGSS.HS-PS1-7

How many cm³ of stock solution of 2.0 M NaCl do you need to prepare 100 cm³ of 0.150M NaCl?

• 7.5 cm³

• 15 cm³

• 1300 cm³

• 200 cm³

Tags

NGSS.HS-PS1-7

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

• M

• mol

• g

• g/L

Calculate the Molarity in a solution containing 40.0 g of NaCl dissolved in 500.0 ml of H₂O.

• 0.0800 M

• 12.5 M

• 1.37 M

• 0.740 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.

A solution is made by dissolving 0.50 mole of NaCl in enough water to give a final volume of 400.0 cm³. What is the molarity of the solution?

• 0.10 M

• 0.40 M

• 1.25 M

• 2.33 M

Tags

NGSS.HS-PS1-7

How many grams of solute are dissolved in 125.0 mL of 5.00 M NaCl (M_r = 58.45)?

• 0.625 g NaCl
• 625 g NaCl
• 36.5 g NaCl
• 0.04 mol NaCl

Tags

NGSS.HS-PS1-7

What is the molarity of a solution made by diluting 26.5 cm³ of 6.00M HNO₃ to a volume of 250 cm³ ?

• 15.9 M

• 0.636 M

• 0.642 M

• 1.59 M

What is the molarity of a solution made by adding 1.565 moles of PbNO₃ to 500 mL?

• 300. M
• 31.3 M
• 3.13 M
• 1.56 M

Tags

NGSS.HS-PS1-7

If I have 340 cm³ of a 0.5 M NaBr solution, what will the concentration be if I add 560 cm³ more water to it?

• 0.188 M

• 3.78 M

• 0.389 M

• 1.76 M

Tags

NGSS.HS-PS1-7