pH scale and Neutralisation

Question 1

Strong acids have a …. concentration of H+ ions

Answer 1

High

Question 2

What is the pH of a solution?

Answer 2

The pH solution is based on the concentration of hydrogen ions in the solution.

Question 3

A lower pH has a ….. concentration of H+ ions

Answer 3

Higher

Question 4

As the pH decreases by 1 unit, the concentration of hydrogen ions …….. by a factor of 10

Answer 4

Increases

Question 5

In a neutral solution the concentration of H+ ions is …… the concentration of OH- ions.

Answer 5

Equal to

Question 6

In a basic solution (alkali), what is the ratio of OH- and H+ ions?

Answer 6

There is more OH- ions making it an alkali with a pH of more than 7.

Question 7

In an acidic solution (acid), what is the ratio of OH- and H+ ions?

Answer 7

More H+ ions than OH- making it an acid with a pH of below 7

Question 8

What is an alkali and what is the difference between an alkali and a base?

Answer 8

An alkali is a base that dissolves in water containing OH- ions, however normal bases do not dissolve in water. They contain O2- ions.

Question 9

What is neutralisation?

Answer 9

When an acid reacts with a base to form a salt (neutral) and water (neutral).

Question 10

What is the ionic equation for neutralisation?

Answer 10

H+ + OH- —> H20