Neutralisation

Q. The mixing of acids and alkalis in order to form salt and water is what we called __________________________

2. What are the products formed when acid neutralises with alkali?

Why does your toothpaste alkaline?

• It can neutralise strong alkaline in

  your mouth

• It can neutralise acid in

  your mouth

• It can refresh your teeth

• Toothpaste is not alkaline.

Pure water has a pH of 7. Pure water _______.

• is a base
• is a neutral substance
• could be either an acid or a base
• is an acid

What colour change in universal indicator would you see if you added nitric acid to sodium hydroxide?

• red -> blue

• purple -> green

• red -> yellow

• pink -> colourless

Complete the word equation below:

Acid + alkali --> ............... + water

• water

• salt

• gold

• metal

.............................. + sodium hydroxide --> sodium chloride + water

• Nitric acid

• Sulphuric acid

• Hydrochloric acid

• Ethanoic acid

Bee sting contain ............................ and can be neutralize using bicarbonate soda.

• alkali

• acid

• vinegar

• soda

Excess acids in stomach can be neutralized using ............

• antacid

• vinegar

• slaked lime

• hydrochloric acid

In a neutralisation reaction, what is the function of the indicator?

• To indicate that the mixture is neutral
• To indicate that hot water should be added
• To indicate that the flask should be shaken
• To indicate that a precipitate is formed