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The effect of the presence of impurities such as carbon and sulphur on iron is that they
give it high tensile strength
make it malleable and ductile
increase its melting point
lower its melting point
The impurities formed during the laboratory preparation of chlorine gas are removed by
H2O
NH3
H2SO4
HCI
Given that M is the mass of a substance deposited during electrolysis and Q is the quantity of electricity consumed, then Faraday's first law can be written as [Electrochemical equivalent]
\(M = \dfrac{E}{Q}\)
\(M = EQ\)
\(M = \dfrac{Q}{E}\)
\(M = \dfrac{E}{2Q}\)
\(\ce{MnO4^- (aq) + Y + 5Fe^2+ (aq) -> Mn^2+ (aq) + 5Fe^2+ (aq) + 4H2O (l)}\)
In the equation above, Y is:
\(5\mathrm{H^+}_{(aq)}\)
\(4\mathrm{H^+}_{(aq)}\)
\(10\mathrm{H^+}_{(aq)}\)
\(8\mathrm{H^+}_{(aq)}\)
The diagram below best illustrates the effect of decrease in
The diagram above best illustrates the effect of decrease in
concentration
temperature
surface area
pressure
