5.2 The pH Scale

What is the pH of an acid?

• More than 7.0

• Less than 7.0

• Exactly 7.0

What is the pH of an alkali?

• Exactly 7.0

• Less than 7.0

• More than 7.0

What is the pH of a neutral solution?

• More than 7.0

• Equal to 7.0

• Less than 7.0

................................... shows how acidic or alkaline a solution is, or whether it is neutral:

• Litmus indicator

• The pH scale

• Hibiscus indicator

• Beetroot indicator.

The higher the pH, the ........................... the solution

• more alkaline.

• more acidic.

The lower the pH, the ........................... the solution

• more alkaline.

• more acidic.

Data that are collected by someone else - not by yourself

• Primary data.

• Secondary data.

• Tertiary data.

What is the purpose of a universal indicator?

• To measure volume

• To measure pH

• To measure temperature

• To measure weight

You can use litmus to measure pH of the solution.

• True.

• False.

What did Jabir Ibn Hayyan discover around 1200 years ago?

(Choose more than one answer)

• How to make ethanoic acid.

• How to make carbonic acid.

• How to make sulfuric acid.

• How to make nitric acid.

• How to make hydrochloric acid.