Reacting acids with carbonates
2 marks · EasyExplain, using ions, how carbon dioxide and water are formed when a carbonate reacts with an acid.
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Must show: States that CO3^{2-} reacts with H^+, Describes production of CO2 and H2O
Also accept: CO3^{2-} ions react with H+ ions to form CO2 and H2O
Common mistakes: Writing ions incorrectly; Not explaining how both products form
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Marking points
M1 · 1 mark · Correctly refers to the reaction of carbonate ions (CO3^{2-}) with hydrogen ions (H+).
A1 · 1 mark · Explains that this forms carbon dioxide and water.
Worked solution
When a carbonate ion (CO3^{2-}) reacts with two hydrogen ions (H+), they combine to form carbon dioxide (CO2) and water (H2O).