Neutralisation

products of a neutralisation reaction are always

• an acid and a base
• an acid and a salt
• salt and water
• salt and base

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 type of reaction occurs when you react an acid with an alkali?

• combustion

• decomposition

• no reaction

• neutralisation

What colour is Universal indicator when the solution is neutral?

• Red

• Green

• Blue

• Purple

What sort of reaction happens when an acid and an alkali are mixed?

• Neutralisation

• Combination

• Acidifying

• Displacement

Why is 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.

Where does the acid in you mouth come from?

• From stomach

• From stomach acid

• From the millions of

  bacteria of mouth

• From the teeth

What colour is litmus in solution of pH 4?

• green

• red

• blue

• dark blue

What is the pH of a neutral solution?

What is the pH of the strongest acid on the pH scale? What colour would it turn litmus paper?

• 0, Purple

• 0, Red

• 14, Purple

• 14, Red