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Acids can undergo neutralisation to form salts - Edexcel - GCSE Chemistry - Question 2 - 2017 - Paper 1

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Acids can undergo neutralisation to form salts. (a) Complete the sentence by putting a cross (X) in the box next to your answer. An acid reacts with a metal oxide ... show full transcript

Worked Solution & Example Answer:Acids can undergo neutralisation to form salts - Edexcel - GCSE Chemistry - Question 2 - 2017 - Paper 1

Step 1

a) An acid reacts with a metal oxide to form

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Answer

The correct answer is D: an acid reacts with a metal oxide to form a salt + water. This occurs through a neutralization reaction, where the acid's hydrogen ions combine with the metal oxide.

Step 2

b) Describe what you would see when solid calcium carbonate reacts with dilute hydrochloric acid.

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Answer

When solid calcium carbonate reacts with dilute hydrochloric acid, you would observe several key indicators. First, you would see the solid calcium carbonate start to fizz or bubble. This is due to the production of carbon dioxide gas as the reaction occurs. Additionally, there might be a slight temperature change in the solution as the acid reacts with the carbonate. The solution may also turn cloudy if there are any undissolved particles present during the reaction.

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