Acids and Bases

Front

What is an acid?

Back

An acid is a substance that donates protons (H+) in a solution and has a pH less than 7. Example: Orange juice.

Front

What is a base?

Back

A base is a substance that accepts protons (H+) or donates hydroxide ions (OH-) in a solution and has a pH greater than 7. Example: Baking soda.

Front

What is pH?

Back

pH is a scale used to measure the acidity or basicity of a solution, ranging from 0 (very acidic) to 14 (very basic), with 7 being neutral.

Front

What happens to blue litmus paper in an acid?

Back

Blue litmus paper turns red when placed in an acidic solution.

Front

What happens to red litmus paper in a base?

Back

Red litmus paper turns blue when placed in a basic solution.

Front

What color does phenolphthalein turn in a basic solution?

Back

Phenolphthalein turns from clear to pink in a basic solution.

Front

What is the pH range of acids?

Back

The pH range of acids is from 0 to 6.9.

Front

What is the pH range of bases?

Back

The pH range of bases is from 7.1 to 14.

Front

What is a neutral solution?

Back

A neutral solution has a pH of 7, meaning it is neither acidic nor basic.

Front

What is the effect of acids on metals?

Back

Acids can react with metals to produce hydrogen gas and a salt.