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5. (a) Zinc carbonate powder is added to dilute hydrochloric acid in a beaker - Edexcel - GCSE Chemistry - Question 5 - 2017 - Paper 1
Question 5
5. (a) Zinc carbonate powder is added to dilute hydrochloric acid in a beaker. A gas is given off: the gas turns limewater milky. Zinc carbonate is added until some... show full transcript
Worked Solution & Example Answer:5. (a) Zinc carbonate powder is added to dilute hydrochloric acid in a beaker - Edexcel - GCSE Chemistry - Question 5 - 2017 - Paper 1
Step 1
Explain how pure zinc chloride solution is obtained from this mixture.
Answer
To obtain pure zinc chloride solution from the mixture of zinc chloride and excess zinc carbonate, a filtration process is employed. First, the mixture is poured through a filter paper placed in a funnel. This action allows for the collection of the liquid zinc chloride, known as the filtrate, into a suitable container such as a conical flask. The solid zinc carbonate that remains on the filter paper can then be discarded, leaving behind the pure zinc chloride solution in the flask.
Step 2
Complete the equation for this reaction by adding the formula of the gas given off and then balancing the equation.
Answer
The complete balanced equation for the reaction is:
ightarrow ext{ZnCl}_2 + ext{H}_2 ext{O} + ext{CO}_2$$ The gas produced in the reaction is carbon dioxide, represented by the formula CO2.Step 3