9. Solutions

Percent Concentrations

9. Solutions

# Percent Concentrations - Video Tutorials & Practice Problems

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Get a 10 bullets summary of the topic**Percent Concentrations** deal with the amount (in mass of volume) of solute found within a given solution.

Mass and Volume Concentrations

1

concept

## Percent Concentrations Concept 1

Video duration:

52sPlay a video:

2

example

## Percent Concentrations Example 1

Video duration:

55sPlay a video:

3

concept

## Percent Concentrations Concept 2

Video duration:

26sPlay a video:

4

example

## Percent Concentrations Example 2

Video duration:

1mPlay a video:

5

Problem

ProblemHow many mL of ethanol are contained in a 750.0 mL bottle of wine that contains 11.0% (v/v) of ethanol?

A

1.5 mL

B

68.2 mL

C

82.5 mL

D

11.0 mL

6

Problem

ProblemCalculate the grams of solute needed to prepare the following:450 mL of a 2.0% m/v KOH solution.

A

1.1 g

B

9.0 g

C

4.5 g

D

2.3 g

7

Problem

ProblemWhat is the mass/volume percent concentration of the following solutions:0.075 mol sucrose (C_{12}H_{22}O_{11}) in 270 mL of solution.

A

5.0 m/v %

B

2.8 m/v %

C

6.7 m/v %

D

9.5 m/v %

8

Problem

ProblemThe pain reliever ibuprofen is sold as an oral suspension for children 2-11 years of age. How many milligrams would you obtain in a 2.7 tsp dose if it contains 100 mg per 5 mL? (1 tsp = 5 mL)

A

1.0×10

^{2}mgB

67 mg

C

2.7×10

^{2}mgD

54 mg

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