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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
To produce dry crystals of magnesium sulfate, follow these steps:
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Prepare your materials: Use magnesium oxide and dilute sulfuric acid.
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Add acid to beaker: Measure a suitable amount of dilute sulfuric acid and pour it into a beaker.
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Warm the acid: Gently warm the sulfuric acid to speed up the reaction.
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Add magnesium oxide: Gradually add magnesium oxide to the warm sulfuric acid while stirring continuously.
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Continue adding until in excess: Keep adding magnesium oxide until you notice that additional amounts no longer react (the solution will turn clear).
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Filter the mixture: Use filter paper and a funnel to remove any unreacted magnesium oxide, collecting the filtrate containing magnesium sulfate solution.
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Evaporate the solution: Heat the filtrate in an evaporating basin to allow water to evaporate until crystals begin to form.
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Crystallize: Once a suitable amount of solution remains, remove it from heat and allow it to cool, forming pure magnesium sulfate crystals.
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Dry the crystals: Collect the crystals and dry them using filter paper.