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Soluble salts are formed by reacting metal oxides with acids - AQA - GCSE Chemistry - Question 1 - 2018 - Paper 1
Question 1
Soluble salts are formed by reacting metal oxides with acids. 1.1 Give one other type of substance that can react with an acid to form a soluble salt. [1 mark] 0.1... show full transcript
Worked Solution & Example Answer:Soluble salts are formed by reacting metal oxides with acids - AQA - GCSE Chemistry - Question 1 - 2018 - Paper 1
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Describe a method to make pure, dry crystals of magnesium sulfate from a metal oxide and a dilute acid.
Answer
To produce pure, dry crystals of magnesium sulfate, follow these steps:
- Set Up the Reaction: Begin by adding magnesium oxide to a beaker.
- Prepare Dilute Acid: Warm some dilute sulfuric acid in a separate container.
- Combine Reactants: Gradually add the warmed sulfuric acid to the beaker with magnesium oxide while stirring.
- Determine Endpoint: Continue to add sulfuric acid until no more magnesium oxide reacts, indicating it is in excess.
- Filtration: Filter the mixture using filter paper and a funnel to remove any unreacted magnesium oxide.
- Evaporate Solution: Heat the filtrate in an evaporating basin to remove excess water, concentrating the solution.
- Crystallization: Allow the solution to cool slowly to promote the formation of crystals.
- Collect Crystals: Once crystals form, filter them out and dry them to obtain pure magnesium sulfate.