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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. 1.2 Calcium ... 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
Method to Produce Magnesium Sulfate Crystals
To produce pure, dry crystals of magnesium sulfate from magnesium oxide and dilute sulfuric acid, follow these steps:
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Preparation:
- Gather your materials: magnesium oxide, dilute sulfuric acid, a beaker, a stirring rod, filter paper, a funnel, and an evaporating basin.
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Mixing:
- Place the dilute sulfuric acid into a beaker and warm it gently.
- Gradually add magnesium oxide to the warm sulfuric acid while stirring continuously. Continue adding until the magnesium oxide is in excess, which indicates that all the sulfuric acid has reacted.
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Filtration:
- Filter the mixture using filter paper and a funnel to remove any unreacted magnesium oxide from the solution, leaving behind the magnesium sulfate solution.
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Crystallization:
- Pour the clear magnesium sulfate solution into an evaporating basin.
- Heat the solution gently to evaporate some of the water and continue boiling until crystals start to form.
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Drying Crystals:
- As crystals form, allow them to cool and fully crystallize.
- Once crystallized, remove them from the basin and dry them using filter paper.
By following these steps, you will obtain pure, dry crystals of magnesium sulfate.