The electrolysis of molten compounds
3 marks · EasyMolten tin(II) chloride () is electrolysed using inert electrodes.
Name the element formed at the cathode.
Write the half-equation for the reaction at the anode.
Explain briefly what happens to the ions during electrolysis.
Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.
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(a) Tin or Sn
(b)
(c) They gain electrons to form tin metal.
Show mark scheme and worked solution
Marking points
B1 (a) · 1 mark · States tin (Sn) as the product at cathode.
B1 (b) · 1 mark · Correct half-equation: 2Cl^- -> Cl_2 + 2e^-.
B1 (c) · 1 mark · Explains that Sn^{2+} gains electrons to form tin metal.
Worked solution
a) Tin (Sn) is formed at the cathode.
c) Sn^{2+} ions accept electrons at the cathode and are reduced to tin metal.