Crash Course: Water and Solutions

What percentage of our bodies is made up of water?

• 40%

• 60%

• 70%

• 80%

2. What is the primary function of water in chemical processes?

• To cool reactions

• To dissolve substances

• To create energy

• To form solids

3. What substance is known as a strong oxidizer used for whitening?

• Hydrogen Peroxide

• Sodium hypo-chlorate

• Sodium Bicarbonate

• Ethanol

4. Why is water considered a polar molecule?

• It has a neutral charge

• It can dissolve oils

• It has a partial negative charge on one side

• It is a gas at room temperature

5. What do we call the particles that carry electrical charge in a solution?

• Ions

• Molecules

• Compounds

• Atoms

7. What happens to the electrical conductivity of a solution when more ions are present?

• It decreases

• It remains the same

• It increases

• It becomes neutral

8. What type of substances do not conduct electricity when dissolved in water?

• Strong acids

• Electrolytes

• Nonelectrolytes

• Salts

6. What is the term for the amount of solute in a solution expressed in moles per liter?

• Density

• Molarity

• Concentration

• Solubility

9. How many grams of hydrogen peroxide are in a 3% solution per liter of water?

• 10 grams

• 30 grams

• 50 grams

• 70 grams

10. What is the dilution equation used for?

• To find the mass of a solid

• To calculate the temperature of a solution

• To determine how to dilute a solution

• To measure the volume of gas