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What is observed when concentrated hydrochloric acid is added to an aqueous solution of CuSO₄, until no further change occurs? A colourless gas is evolved and a precipitate forms - AQA - A-Level Chemistry - Question 18 - 2019 - Paper 3
Question 18
What is observed when concentrated hydrochloric acid is added to an aqueous solution of CuSO₄, until no further change occurs? A colourless gas is evolved and a pre... show full transcript
Worked Solution & Example Answer:What is observed when concentrated hydrochloric acid is added to an aqueous solution of CuSO₄, until no further change occurs? A colourless gas is evolved and a precipitate forms - AQA - A-Level Chemistry - Question 18 - 2019 - Paper 3
Step 1
The solution changes colour and no precipitate forms.
Answer
When concentrated hydrochloric acid is added to an aqueous solution of CuSO₄, the solution changes from blue to a different colour, indicating a reaction, but no precipitate forms. This is due to the fact that copper sulfate remains soluble in concentrated hydrochloric acid, leading to a change in the solution's appearance rather than the formation of a solid precipitate.