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I need to know the answers to these questions by Monday, please is there anyone here who can help me, it will be greatly appreciated or else I'll get my head chopped of my chem teacher.
Reply 3
A) Mg added to dilute HCL

Metals are usually reducing agents:

Mg + H+ ----> Mg+ + 0.5 H2

B) Zn added to aqeous CuSo4

Zinc is the better reducing agent out of the two metals:

Zn + Cu2+ ---> Zn2+ + Cu

C)CLO- added to Pb(no3)2

Hypochlorates are strong oxidising agents:

ClO- (aq) + 2H+ (aq) + 2e- ---> Cl- (aq) + H2O (l) ....(1)

Oxidises almost anything:

Pb2+ ----> Pb4+ + 2e- ....(2)

Combine (1) and (2) to remove the electrons.

D)Mn04- added to hot enthane dioic acid

Oxalic acid reducing agent:

http://chemed.chem.purdue.edu/genchem/topicreview/bp/ch19/oxred_3.php


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