Properties and Solutions of Water

What percentage of the human body is made up of water?

• 20%

• 40%

• 60%

• 80%

What is a water-based solution called?

• A liquid solution

• A polar solution

• An aqueous solution

• A solvent solution

Why is water considered a good solvent?

• It is very cold.

• It is a polar molecule.

• It is always found in large amounts.

• It is a gas at room temperature.

What are ions in water called that carry an electrical charge?

• Solutes

• Electrolytes

• Solvents

• Molecules

What kind of substance completely breaks apart into ions when dissolved in water and conducts electricity very well?

• Weak electrolyte

• Nonelectrolyte

• Strong electrolyte

• Non-conductor

How does hydrogen peroxide help remove stains from laundry?

• It adds color to the stains.

• It creates new double bonds in the stains.

• Its oxygen ions break down the double bonds that give stains color.

• It makes the stains dissolve better in water.

What is molarity a measure of in a solution?

• The mass of the solvent.

• The number of moles of solute per liter of solution.

• The total volume of the solution.

• The temperature of the solution.

When you dilute a solution by adding more solvent, what happens to the total amount of solute?

• It increases.

• It decreases.

• It stays the same.

• It changes depending on the solvent.