A student investigates how to make a sample of a pure salt - OCR Gateway - GCSE Chemistry: Combined Science - Question 14 - 2020 - Paper 1
Question 14
A student investigates how to make a sample of a pure salt.
His method is shown in Fig. 14.1.
Stage 1
React an excess of copper oxide with 50 cm³ dilute hydrochlor... show full transcript
Worked Solution & Example Answer:A student investigates how to make a sample of a pure salt - OCR Gateway - GCSE Chemistry: Combined Science - Question 14 - 2020 - Paper 1
Step 1
a) Name the type of insoluble compound that neutralises an acid to form a salt and water.
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Answer
The type of insoluble compound that neutralises an acid to form a salt and water is a base.
Step 2
b) Describe one safety precaution the student should take when using dilute hydrochloric acid.
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One safety precaution the student should take is to wear safety goggles to protect their eyes from splashes of dilute hydrochloric acid.
Step 3
c) Give a reason why Stage 1 uses an excess of copper oxide.
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Answer
Stage 1 uses an excess of copper oxide to ensure that all the acid is completely neutralised and converted into the corresponding salt.
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