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The set-up below (figure 2) was used to electrolyse a bromide of metal D, `DBr_2.`

i) Write equation for the reactions at the
I cathode
II anode
(b) The electrodes used in the experiment were made of carbon and metal D. which of the two electrodes was
used as the anode? Give a reason.
(c) Give a reason why this experiment is carried out in a fume cupboard.
(d) When a current of 0.4 A was passed for 90 minutes, 2.3 1 g of metal D were deposited.
(i) Describe how the amount of metal D deposited was determines.
(ii) Calculate the relative atomic mass of metal D. (I Faraday = 96500 coulombs)