Neutralisation

Neutralisation

Neutralisation

• When an alkali is added to a acid, the acid is neutralised. The excess H+ ions react with OH - ions to produce water.

  
  

  H⁺_(aq) +OH^-_(aq) -> H₂O_(l)

  
  

• During this reaction the pH will change as the solution goes from an acid to a neutral solution to an alkali.

If you added an acid to an alkaline solution, the colour of the indicator would turn slowly more green during a neutralisation reaction.

Fill in the Blanks

Fill in the Blanks

Multiple Select

How can the pH of a solution be measured? (select 2!)

• pH paper

• litmus paper

• universal indicator

• dye

Multiple Choice

Universal indicator paper is used in an experiment.

Is this solution in the picture an acid / alkali / neutral.

• Acid

• Alkali

• Neutral

Multiple Choice

When an acid and an alkali react together in a neutralisation reaction, what colour will the indicator turn by the end of the reaction

• Red

• Orange

• Green

• Blue

• Purple

Multiple Select

What pH do you think the solution is?

• 2

• 4

• 7

• 9

• 11

Multiple Select

Universal Indicator is added to this solution. What pH do you think the solution is?

• 2

• 4

• 7

• 8

• 12