Acids, Bases, and Salts Quiz

What do reactions between acids and bases always form?

• Salt plus water

• Only salt

• Only water

• Salt plus carbon dioxide

What is formed when hydrochloric acid reacts with sodium oxide?

• Hydrogen gas

• Sodium chloride

• Sodium hydroxide

• Chlorine gas

What additional product is formed when acids react with metal carbonates?

• Hydrogen gas

• Oxygen gas

• Carbon dioxide

• Sulfur dioxide

What is the result of reacting sulfuric acid with potassium hydroxide?

• Potassium sulfide

• Potassium sulfate

• Potassium chloride

• Hydrogen gas

How do you know when the base is in excess during a reaction to form a soluble salt?

• The base starts to disappear faster

• Some of the base no longer disappears

• The solution turns pink

• Bubbles form in the solution

What is the first step in making a soluble salt using an insoluble base?

• Adding the insoluble base

• Evaporating the water

• Filtering the solution

• Heating the acid

What happens when you add more insoluble base than the acid can react with?

• The reaction stops

• The temperature increases

• The acid becomes more concentrated

• The base remains unreacted

What is used to filter out the excess base in the process of making a soluble salt?

• A centrifuge

• A distillation apparatus

• A sieve

• Filter paper and funnel

What should you use to gently heat the filtered solution to form crystals?

• A Bunsen burner

• A water bath or an electric heater

• A microwave

• Direct sunlight

What is the final step in obtaining pure solid crystals of the salt?

• Reheating the crystals

• Adding more acid

• Filtering and drying the crystals

• Dissolving them in water