Acids, Bases & pH review

Front

What is the pH scale?

Back

The pH scale is a measure of how acidic or basic a substance is, ranging from 0 (very acidic) to 14 (very basic), with 7 being neutral.

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.

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.

Front

What is a neutral substance?

Back

A neutral substance has a pH of 7, meaning it is neither acidic nor basic, like pure water.

Front

What is the pH of lemon juice?

Back

Lemon juice is acidic, typically having a pH around 2.

Front

What is the pH of soap?

Back

Soap is basic, usually having a pH around 9 to 10.

Front

What is the role of the pancreas in digestion?

Back

The pancreas produces bicarbonate, a base that neutralizes stomach acid in the small intestine.

Front

What happens to pH when an acid is added to water?

Back

The pH of the solution decreases, making it more acidic.

Front

What happens to pH when a base is added to water?

Back

The pH of the solution increases, making it more basic.

Front

What is the range of the pH scale for acidic substances?

Back

The range for acidic substances is from 0 to 7.