Acids, Bases and Salts

What is a salt in chemistry?

• A product formed from the reaction of an acid and a base.

• A pure substance that cannot be broken down into simpler substances.

• A solution that contains dissolved ions.

• A type of metal that conducts electricity.

What is a base?

• A substance that accepts protons (H+) and has a pH greater than 7.

• A substance that donates protons (H+) and has a pH less than 7.

• A neutral substance with a pH of 7.

• A substance that increases the concentration of hydroxide ions (OH-) in solution.

What is salt?

• A chemical compound.

• A type of mineral water.

• A flavor enhancer used in cooking.

• A natural sweetener.

What is a characteristic of bases?

• They have a sour taste.

• They have a slippery feel.

• They turn red litmus paper blue.

• They are good conductors of electricity.

What is the pH scale?

• A scale that measures how acidic or basic a substance is, ranging from 0 to 14.

• A scale that measures temperature in Celsius and Fahrenheit.

• A scale that indicates the density of liquids.

• A scale used to measure the weight of gases.

Which of the following statements about acids is true?

• They taste sweet.

• They taste sour.

• They taste salty.

• They taste bitter.

What is neutralization?

• The reaction between an acid and a base to produce salt and water.

• The process of adding an acid to a solution to increase its pH.

• The combination of two acids to form a stronger acid.

• The reaction of a base with a metal to produce hydrogen gas.

What is an acid?

• A substance that donates protons (H+) and has a pH less than 7.

• A substance that accepts protons (H+) and has a pH greater than 7.

• A neutral substance with a pH of 7.

• A substance that increases the concentration of hydroxide ions (OH-) in a solution.

What does a pH of 7 indicate?

• Neutrality; the substance is neither acidic nor basic.

• Acidity; the substance is highly acidic.

• Basicity; the substance is highly basic.

• Unstable; the substance is likely to change pH.

What is produced when an acid reacts with a base?

• Salt and water.

• Hydrogen gas and oxygen.

• Carbon dioxide and water.

• Ammonia and salt.