Acids, bases and salts

The word equation for an acid reacting with a metal is

Which of the following values would represent the pH of a strong base?

• 1

• 8

• 7

• 13

Which of the following is NOT a characteristic of an acid?

• sour taste

• corrosive

• turns litmus paper blue

• neutralises bases

Which of the following is true .

• Acids and bases form hydroxide ions in solution

• Acids form hydroxide ions and bases hydrogen ions in solution

• Acids form hydrogen ions in solution, bases do not form ions in solution

• Acids form hydrogen ions in solution and bases hydroxide ions

A substance that is 3 on the pH scale would be a(n):

• acid

• base

• neutral

• solute

Which one of the following is an example of a base?

• orange juice
• dish soap
• vinegar
• lemons

Indigestion occurs when

• stomach acid rises into the oesophagus, causing burns, because it is corrosive

• the pH in the stomach is too high, so the stomach lining is damaged

• there is not enough stomach acid to digest food sufficiently

• stomach acid has reacted with carbonates to form carbon dioxide

When the pH of your pool is too low, it can irritate your skin, what do you need to add to raise it

• salt (e.g. sodium chloride)

• chlorine

• hydrochloric acid

• sodium carbonate

Which of the following is a neutralisation reaction?

• metal + acid → salt + hydrogen

• metal + acid → salt + water

• carbonate + acid → salt+ carbon dioxide + hydrogen

• base + acid → salt + water

When nitric acid is added to magnesium metal a reaction occurs and a gas is produced. The products of this reaction are:

• magnesium nitrate and hydrogen gas.

• magnesium carbonate and carbon dioxide.

• magnesium chloride and hydrogen gas.

• magnesium sulphate and carbon dioxide.