Acids & Bases

The word equation for an acid reacting with a metal is

Properties of bases are

• feel soapy and neutralise acids

• irritate your skin and react with metals to produce bubbles

• taste sour and turn litmus red

• have pH less than 7

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

• 1

• 8

• 7

• 13

Bleach and oven cleaner are:

• strong acids
• weak acids
• strong bases
• weak bases

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 high, algae and bacteria can flourish, what do you need to add to lower it

• salt (e.g. sodium chloride)

• chlorine

• hydrochloric acid

• sodium carbonate