Reacting acids with bases
2 marks · NormalExplain why the reaction between an acid and a metal hydroxide is classified as a neutralisation reaction.
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Must show: Acid donates hydrogen ions (H+), Base/alkali donates hydroxide ions (OH−), Formation of water
Also accept: Reference to H+ and OH− combining
Common mistakes: Giving only products without linking to neutralisation; Missing explanation of ion combination
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Marking points
M1 · 1 mark · Mentions acid provides H+ ions and base provides OH− ions.
M2 · 1 mark · These combine to form water, removing both ions and resulting in a neutral solution.
Worked solution
A neutralisation reaction occurs because the hydrogen ions (H+) from the acid and hydroxide ions (OH−) from the base combine to form water, removing both from solution and producing a neutral substance.