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In this lesson, we will learn how to use the equation n = cV to calculate the volume or concentration of a solution or the mass or moles of solute present.

Q1:

What volume of a 1.50-M K B r solution contains 6 6 . 0 g K B r ?

Q2:

If 0.850 L of a 5.00-M solution of copper nitrate, C u ( N O ) 3 2 , is diluted to a volume of 1.80 L by the addition of water, what is the molarity of the diluted solution?

Q3:

Which of the following is a valid expression of molality ( π ) ?

Q4:

A liter of air contains 9 . 2 Γ 1 0 β 4 mol argon. What is the mass of A r in a liter of air?

Q5:

Calculate the mass of sodium chloride that must be added to water to prepare 80.0 mL of a 0.800 M solution.

Q6:

What is the concentration of the solution that results from diluting 25.0 mL of a 2.04 M solution of C H O H 3 to 500.0 mL?

Q7:

What volume of a 0.575-M solution of glucose, C H O 6 1 2 6 , can be prepared from 50.00 mL of a 3.00-M glucose solution?

Q8:

The concentration of acetic acid ( C H C O H ) 3 2 in a sample of vinegar is 0.839 M. What volume of this vinegar contains 75.6 g of acetic acid?

Q9:

How many grams of N a C l are contained in 0.250 L of a 5.30 M solution?

Q10:

Wine is approximately 1 2 % ethanol ( C H C H O H ) 3 2 by volume. Ethanol has a molar mass of 46.06 g/mol and a density 0.789 g/mL. How many moles of ethanol are present in a 750 mL bottle of wine?

Q11:

What is the mass of 2.561 mol of gold?

Q12:

What volume of 1.59 M aqueous K O H is required to prepare 5.00 L of 0.100 M aqueous K O H ?

Q13:

How much sugar (in moles) is contained in a modest sip (βΌ10 mL) of a soft drink, if the concentration of sugar is 0.375 M?

Q14:

A solution is prepared by dissolving 1.60 g of solid N a C l in 50.0 mL of 0.100 M aqueous C a C l 2 . Assuming the volume of the solution does not change, calculate the concentration of chloride ions in this solution.

Q15:

What volume of 0 . 1 2 M H B r can be prepared from 11 mL (0.011 L) of 0 . 4 5 M H B r ?

Q16:

Calculate the mass of methanol that must be added to water to prepare 2.66 L of a 1.35 M solution.

Q17:

A 355 ml soft drink sample contains 0.133 mol of sucrose (table sugar). What is the molar concentration of sucrose in the beverage?

Q18:

Rubbing alcohol (isopropanol) is usually sold as a 7 0 % vol aqueous solution. If the density of isopropyl alcohol is 0.785 g/mL, calculate to 3 significant figures the number of grams of isopropyl alcohol present in a 355 mL bottle of rubbing alcohol.

Q19:

How many milliliters of a 0.100 M potassium permanganate stock solution would be needed to make 100 mL of 0.0250 M potassium permanganate?

Q20:

A 0.2104 M aqueous solution of sodium sulfate has a total volume of 900 mL.

Calculate the mass of sodium ions in this solution.

Calculate the mass of sulfate ions in this solution.

Q21:

A laboratory experiment calls for 0 . 1 2 5 M H N O 3 . What volume of 0 . 1 2 5 M H N O 3 can be prepared from 0.250 L of 1 . 8 8 M H N O 3 ?

Q22:

An aqueous solution of 62.00 g iron(III) iodide is diluted to a volume of 725 mL. Calculate the concentration of iodide ions in this solution.

Q23:

Concentrated hydrochloric acid is an aqueous solution containing 3 7 . 2 % H C l by mass. The density of this solution is 1.19 g/mL. What mass of H C l is contained in 0.500 L of this solution?

Q24:

If 4.94 g of K O H is dissolved in water to make a final volume of 2.0 L, what is the molarity of the solution?

Q25:

How many grams of C a C l 2 (110.98 g/mol) are contained in 250.0 mL of a 0.200 M solution of calcium chloride?

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