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AQA A Level Chemistry

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    • Thread Starter

    I'm a little stuck on these questions, if anyone could help me out It would be great

    A reaction of calcium with sulphuric acid was faster than the reaction of magnesium with HCL. However the reaction of calcium with sulphuric acid soon stopped even though some calcium remained. A white solid formed
    Give two reasons why the reaction was faster at first with calcium and sulphuric acid than with magnesium and hydrochloric acid

    2) Identify the white solid and write and equation for the formation in this reaction. Explain why the reaction of calcium and sulphuric acid stopped even though some calcium remained

    White solid___________________________ ________________________________ _________

    Equation________________________ ________________________________ ______________

Explanation__________________ ________________________________ ___________________

_______ ________________________________ ________________________________ _______

    ________________________________ ________________________________ ______________

    3) A Grignard reagent is a compound in which magnesium is bonded to an alkyl group (R) and a halogen (X). It can be represented by the formula RMgX.
    A Grignard reagent is formed by the reaction of magnesium metal with haloalkane using dry ethoxyethane as a solvent. Ethoxyethane has a boiling point of 35 centigrade, forms a dense vapour and is highly flammable.
    Give one reason why a hot water bath is used rather than direct heating with a bunsen burner when preparing the Grignard reagent
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