Question
2
This question is about electrolysis.
(a)
State the meaning of the term electrolyte
A
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(2)
(b) The table gives information about the electrolysis of two electrotytes. Carbon (graphiti
electrodes are used in each experiment.
(1) Complete the table to show the observations and products of electrolysis.
positive electrode (anode)
negative electrode (cathode)
electrolyte
observations
name of product
observations
name / proi
aqueous
colourless
copper(I) sulfate
bubbles
concentrated aqueous
colouriess
bubbles
hydrog
sodium bromide
Answer
At the anode of the aqueous copper(I) sulfate electrolyte, bubbles of oxygen gas are observed and copper metal is produced. At the anode of the aqueous sodium bromide electrolyte, bubbles of hydrogen gas are observed and bromine gas is produced.