5.5 CHAPTER 5. THE CHEMICAL INDUSTRY
+
Power supply
-
Saturated
NaCl
Depleted
NaCl
M
Gas A Gas B
N
NaOH
(a) Give two reasons why the membrane cell is the preferred cell for
the preparation of chlorine.
(b) Why do you think it is advisable to use inert electrodes in this
process?
(c) Write down the equation for the half-reactiontaking place at elec-
trode M.
(d) Which gas is chlorine gas? Write down onlyGas A or Gas B.
(e) Briefly explain howsodium hydroxide formsin this cell.
(DoE Exemplar Paper 2,2007)
- The production of nitric acid is very important in the manufacture of
fertilisers. Look at thediagram below, whichshows part of the fer-
tiliser production process, and then answer the questions that follow.
(1) N 2 (g)
+ H 2 (3)
(2) + O 2 NO + H 2 O
Ostwald Process
(4)
(a) Name the process at(1).
(b) Name the gas at (2).
(c) Name the process at(3) that produces gas (2).
(d) Name the product at (4).
(e) Name two fertilisersthat can be produced from nitric acid.
- A lead-acid battery has a number of differentcomponents. Match the
description in Column Awith the correct word or phrase in Column
B. All the descriptions inColumn A relate to lead-acid batteries.
