Acids and alkalis revision

_{What is the hazard shown in this hazard sign?}

• Explosive

• Corrosive

• Irritant

• High level Irritant

What colour is universal indicator in a neutral solution?

• Green
• Orange
• Purple
• Red

A(n) ______ is a substance with a pH less than 7

• Acid
• Alkaline
• Base
• Buffer

A solution with a pH of 3.6 would be...

• Acid
• Base
• Neutral
• Acid and Base

According to the pH range which substance is more acidic than lemon juice?

• hydrochloric acid

• cabbage

• milk

• lye

Acid + Alkali --> Salt + Water

• neutralization reaction

• synthesis

• decomposition

• single displacement

A neutralization reaction will always produce...

• water & salt
• water
• salt
• water & carbon

An indicator will ______________ when it is in contact with an acid or base

• Bubble
• Form a new substance
• Change color
• Stay the same color

What does pH measure?

• the amount of hydrogen (H⁺) ions

• the amount of hydroxide (OH^-) ions

• amount of water

• all of the above

Complete the following reaction:

Hydrochloric acid + magnesium hydroxide -->

• Magnesium chloride + water

• Magnesium + water

• Magnesium chloride + hydrogen

• Magnesium chloride + water + carbon dioxide