A student took a solution of copper sulphate in a beaker and put a clean iron nail
into it and left it for about an hour. [5 marks]
(a) What changes do you expect?
(b) How is rust, dust or grease removed from the nail before starting the activity?
(c) Are these changes chemical in nature?
(d) Write the word equation of the reaction that took place.
(e) Is this an example of displacement reaction? JustifA student took a solution of copper sulphate in a beaker and put a clean iron nail
into it and left it for about an hour. [5 marks]
(a) What changes do you expect?
(b) How is rust, dust or grease removed from the nail before starting the activity?
(c) Are these changes chemical in nature?
(d) Write the word equation of the reaction that took place.
(e) Is this an example of displacement reaction? Justif
Answers
Answer:
Changes observed
Changes observed(i) Colour of the solution in the beaker changes from blue to green.
Changes observed(i) Colour of the solution in the beaker changes from blue to green.(ii) A brown coloured deposit is found on the surface of the iron nail.
Changes observed(i) Colour of the solution in the beaker changes from blue to green.(ii) A brown coloured deposit is found on the surface of the iron nail.(b) Nature of changes
Changes observed(i) Colour of the solution in the beaker changes from blue to green.(ii) A brown coloured deposit is found on the surface of the iron nail.(b) Nature of changesThese changes are chemical changes as the new substances are formed in the form of iron sulphate and copper.
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