Introduction to Solutions

What is the molarity of 2.5 mol of NaOH in 12.0 L of solution?

• 0.21 M

• 30 M

• 4.8 M

• 20.8 M

What is the concentration, in percent by mass, of 0.62 g of solute in 45.0 g of solution?

• 0.014 %
• 1.4 %
• 0.13%

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

• 2.55 g

• 22 g

• 0.05 g

What is the molarity of 4 g of NaCl (Molar Mass =58.45 g/mol) in 3,800 mL of solution?

• 0.018 M

• 0.0011 M

• 1.052 M

• 0.062 M

How many grams of solute are dissolved in 125.0 mL of 5.00 M NaCl (Molar Mass = 58.45 g/mol?

• 0.625 g NaCl

• 625 g NaCl

• 36.5 g NaCl

• 0.04 mol NaCl

In the above picture, a powder is about to be poured into the liquid. Which of the following should be done to make this powder dissolve faster?

• stir the powder in the liquid
• freeze the mixture
• add more powder to the liquid
• store the mixture in a dark place

Tags

NGSS.HS-PS1-5

A solute is........

• any substance that will dissolve in a solvent

• anysubstance that will not dissolve in a solvent

• the same as a solvent

• is always a solid

Tags

NGSS.HS-PS1-5

Water is known as

• the universal solute

• something you drink to stay young

• the universal solvent

• something you drink to get old

Tags

NGSS.HS-ESS2-5

A solution that can hold more solute  is called

• saturated
• supersaturated
• unsaturated
• insoluble