6.1 Properties of acid and alkali

Acid is a chemical compound that produces ____________ when dissolves in water.

• hydroxide ions, OH^-

• hydrogen ions, H⁺

Alkali is a chemical compound that produces ____________ when dissolves in water.

• hydroxide ions, OH^-

• hydrogen ions, H⁺

Alkali tasted like _________ which is bitter.

• 
• 
• 
• 

Answer explanation

Acid tasted sour

Alkali tasted bitter

Alkali has a pH value of ________

• pH 1 - 14

• pH 1 - 6

• pH 7

• pH 8 - 14

Acid has a pH value of ________

• pH 1 - 14

• pH 1 - 6

• pH 7

• pH 8 - 14

Examples of INORGANIC ACID are ?

• Acetic acid (Vinegar), Tartaric acid (Grapes)

  Formic acid (Bees, Ants)

  Tannic acid (Tea)

  Carbonic acid (Carbonated drinks)

• Citric acid (Lime,Orange)

  Malic acid (Green apple)

  Lactic acid (Sour milk, Yoghurt)

• Hydrochloric acid

  Sulphuric acid

  Nitric acid

• Formic acid (Bees, Ants)

  Tannic acid (Tea)

  Carbonic acid (Carbonated drinks)

Oxide or metal hydroxide dissolves in water to form alkali, which one are the examples of alkali ?

• Potassium hydroxide

• Hydrochloric acid

• Carbonic acid

• Ammonia

Turn RED litmus paper to BLUE referring to __________

• Neutral

• Acid / Alkali

• Alkali

• Acid

Filter paper corrodes(being corrosive) when there is ________ substances was put in there.

• Acid / Alkali

• Acid

• Neutral

• Alkali

Which one reacts with metal and produce hydrogen gas ?

• Alkali

• Acid

• Neutral

• Sour