Chemistry · BGCSE / Redox and electrolysis

StructuredPast exam questionForm 5 · BGCSE

A steady current of 15 A was allowed to flow through the electrolyte for 1 hour 30 minutes. The equation shows how chlorine is produced: 2Cl⁻ → Cl₂ + 2e⁻. [1 Faraday = 96 500 C; 1 mole of any gas occupies 24 dm³ at r.t.p.]

  1. aCalculate the quantity of electricity in coulombs that was passed through the electrolyte. [2]
  2. bCalculate the number of moles of electrons used. [1]
  3. cCalculate the volume of chlorine that will be produced. [2]

You'll mark your own answer against the marking guide when you hand it in.

Source: BEC BGCSE Chemistry 2013, Paper 3, Question 3(c)
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