Preparation of Salts
6 past-paper questions on Preparation of Salts · examined 2020–2025.
20251 question
A student is making a sample of aqueous copper(II) sulfate. The student adds an excess of copper(II) oxide powder to warm sulfuric acid and stirs the mixture.
20241 question
Describe how to prepare pure, dry crystals of zinc chloride after reacting excess zinc with dilute hydrochloric acid.
20232 questions
Plan an experiment to prepare pure dry crystals of ammonium sulfate. Your plan should include the use of: • common laboratory apparatus • dilute sulfuric acid • aqueous ammonia • methyl orange indicator. No other chemicals should be used.
Plan an experiment to prepare pure dry crystals of ammonium sulfate. Your plan should include the use of: • common laboratory apparatus • dilute sulfuric acid • aqueous ammonia • methyl orange indicator. No other chemicals should be used.
20202 questions
Copper(II) sulfate is prepared by reacting excess copper(II) carbonate with dilute sulfuric acid. Which two pieces of apparatus are needed to obtain copper(II) sulfate crystals by this reaction?
Magnesium oxide is an insoluble base that can be used to prepare pure magnesium sulfate crystals. Describe the essential practical details for the preparation of pure magnesium sulfate crystals from magnesium oxide.
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