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# Concentration of Solutions Quiz

Created by
@EffortlessShark

### What does percent by mass (w/w) measure in a solution?

• The mass of solute (in grams) for every 100 grams of solution (correct)
• The volume of solute (in milliliters) for every 100 milliliters of solution
• The mass of solvent (in grams) for every 100 grams of solution
• The number of moles of a component of a solution divided by the total number of moles of all components
• ### What does percent by volume (v/v) measure in a solution?

• The volume of solute (in milliliters) for every 100 milliliters of solution (correct)
• The number of moles of a component of a solution divided by the total number of moles of all components
• The mass of solvent (in grams) for every 100 grams of solution
• The mass of solute (in grams) for every 100 grams of solution
• ### What does mole fraction measure in a solution?

• The mass of solvent (in grams) for every 100 grams of solution
• The number of moles of a component of a solution divided by the total number of moles of all components (correct)
• The mass of solute (in grams) for every 100 grams of solution
• The volume of solute (in milliliters) for every 100 milliliters of solution
• ### If 20 grams of sugar are dissolved in 80 grams of water, what is the percent by mass (w/w) of the sugar?

<p>40%</p> Signup and view all the answers

### If 30 milliliters of ethanol are mixed with 70 milliliters of water, what is the percent by volume (v/v) of ethanol?

<p>30%</p> Signup and view all the answers

### What does the percent by mass (m/m) measure in a solution?

<p>The mass of solute (in grams) for every 100 grams of a solution</p> Signup and view all the answers

### What does the mole fraction measure in a solution?

<p>The number of moles of a component of a solution divided by the total number of moles of all components</p> Signup and view all the answers

### What does the percent by volume (v/v) measure in a solution?

<p>The volume of solute (in milliliters) for every 100 grams of a solution</p> Signup and view all the answers

### What does the percent by mass per volume measure in a solution?

<p>The mass of solute (in grams) for every 100 milliliters of a solution</p> Signup and view all the answers

### What does the percent by volume per volume measure in a solution?

<p>The volume of solute (in milliliters) for every 100 milliliters of a solution</p> Signup and view all the answers

### What does the mole fraction measure in a solution?

<p>The number of moles of a component divided by the total number of moles of all components</p> Signup and view all the answers

### What does the percent by mass (m/m) measure in a solution?

<p>The mass of solute in grams for every 100 grams of solution</p> Signup and view all the answers

### What does the percent by volume (v/v) measure in a solution?

<p>The volume of solute in milliliters for every 100 milliliters of solution</p> Signup and view all the answers

### What does the percent by mass per volume measure in a solution?

<p>The mass of solute in grams for every 100 milliliters of solution</p> Signup and view all the answers

### If 25 grams of salt are dissolved in 125 grams of water, what is the percent by mass (w/w) of the salt?

<p>25%</p> Signup and view all the answers

## Study Notes

### Solution Concentration Measures

• Percent by mass (w/w) measures the mass of the solute per unit mass of the solution.
• Percent by volume (v/v) measures the volume of the solute per unit volume of the solution.
• Mole fraction measures the number of moles of the solute per unit total number of moles in the solution.

### Calculating Percent by Mass (w/w)

• If 20 grams of sugar are dissolved in 80 grams of water, the percent by mass (w/w) of the sugar is 20g/(20g+80g) x 100% = 20%.
• If 25 grams of salt are dissolved in 125 grams of water, the percent by mass (w/w) of the salt is 25g/(25g+125g) x 100% = 16.7%.

### Calculating Percent by Volume (v/v)

• If 30 milliliters of ethanol are mixed with 70 milliliters of water, the percent by volume (v/v) of ethanol is 30mL/(30mL+70mL) x 100% = 30%.

### Other Concentration Measures

• Percent by mass (m/m) measures the mass of the solute per unit mass of the solvent.
• Percent by mass per volume measures the mass of the solute per unit volume of the solution.
• Percent by volume per volume measures the volume of the solute per unit volume of the solution.
• Mole fraction measures the ratio of the number of moles of the solute to the total number of moles in the solution.

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## Description

Test your knowledge of different ways to express the concentration of solutions, including percent by mass, mole fraction, molarity, molality, percent by volume, and ppm.

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