Reacting acids with carbonates
3 marks · Easy| Carbonate | Acid used | Gas seen | Other products |
|---|---|---|---|
| Zinc carbonate | Hydrochloric acid | Yes | Zinc chloride, water |
| Potassium carbonate | Sulfuric acid | Yes | Potassium sulfate, water |
Study the table above. Answer the following:
What word equation best fits the reactions shown?
Name the gas that is always formed.
What other product, besides a salt and gas, is always formed?
Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.
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(a) carbonate + acid → salt + carbon dioxide + water
(b) carbon dioxide
(c) water
Common mistakes: Omitting water; Naming hydrogen instead of carbon dioxide
Show mark scheme and worked solution
Marking points
B1 (a) · 1 mark · Gives the correct word equation for acid and carbonate.
B1 (b) · 1 mark · Identifies the gas as carbon dioxide.
B1 (c) · 1 mark · States that water is also formed.
Worked solution
a) The word equation is: carbonate + acid → salt + carbon dioxide + water.
b) The gas formed in all reactions is carbon dioxide.
c) The other product is water.