Identifying Ions
Q1.
This question is about magnesium and magnesium chloride.
(a)     Magnesium chloride contains magnesium ions (Mg2+) and chloride ions (Cl⁻).
Describe, in terms of electrons, what happens when a magnesium atom reacts with chlorine atoms to produce magnesium chloride.
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(4)
(b)     Magnesium chloride can be electrolysed.
The diagram below shows two experiments for electrolysing magnesium chloride.
 
(i)      Explain why magnesium chloride must be molten or dissolved in water to be electrolysed.
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(2)
(ii)     Explain how magnesium is produced at the negative electrode in Experiment 1.
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(3)
(iii)    In Experiment 2 a gas is produced at the negative electrode.
Name the gas produced at the negative electrode.
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(1)
(iv)     Suggest why magnesium is not produced at the negative electrode in Experiment 2.
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(1)
(v)     Complete and balance the half equation for the reaction at the positive electrode.
_____ Cl⁻       →       Cl2       +       _____
(1)
(c)     Magnesium is a metal.
Explain why metals can be bent and shaped.
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(2)
(Total 14 marks)