1. Neutralisation
D. Crowley, 2008

2. Saturday, April 21, 2018
Neutralisation
To understand neutralisation

3. Acid Or Alkali Are the following acids or alkalis? Hydrochloric (HCl)
Sodium hydroxide (NaOH)
Sulphuric (H2SO4)
Nitric (HNO3)
Ammonium hydroxide (NH4OH)
Toothpaste
Lemon juice
Oven cleaner
Stomach fluid
Indigestion tablets
Acid (Hydrochloric acid)
Alkali
Acid (Sulphuric acid)
Acid (Nitric acid)
Alkali
Alkali
Acid
Alkali
Acid (Stomach acid)
Alkali

4. Acid + Alkali What happens when we mix and acid and alkali?
Mixing an acid and alkali results in a chemical reaction, forming new products…

5. Neutralisation
The chemical reaction between an acid and alkali is called neutralisation
Acid
Alkali
Salt + Water
If you add just the right amount of acid and alkali together a neutral solution is formed (the pH value gets close to pH 7 - neutral)

6. Experiment
Your task is to see if you can undertake a neutralisation reaction
In a boiling tube add a small amount of acid
Using a pipette add one drop of alkali at a time, until you produce a neutral solution

7. Chemical Reaction Acid Alkali Salt Water
The chemical reaction between an acid and alkali is: -
Acid
Alkali
Salt
Water

8. Stings A bee sting is acidic A wasp sting is alkaline
Why can bicarbonate of soda (pH 9) be used to treat a bee sting?
Why can vinegar (pH 3) be used to treat a wasp sting?
Adding just the right amount of acid or alkali to the sting causes it to neutralise!

9. Anagrams

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