When a substance is oxidized, it electrons and its oxidation number When a subst

Question

When a substance is oxidized, it electrons and its oxidation number When a substance is reduced, it electrons and its oxidation number Determine the oxidation number of each clement in: HCIO_4 C-2O_4^2- In each of the following redox reactions, determine which element is oxidized and which is reduced. Cl_2 (aq) + 2 I (aq) rightarrow I_2 (aq) + 2 Cl' (aq) Fe_2O_3 (s) + 3 CO (g)rightarrow 2 Fe (s) + 3 CO_2 (g) Write balanced molecular and net ionic equations for the reaction of: magnesium metal with a solution of perchloric acid. chromium with a solution of hydrochloric acid. (The chromium is oxidized to chromium

Explanation / Answer

1)

a)

when substance is oxidized, it loses electrons and its oxidation number increases

b)

when substance is reduces, it gains electron and its oxidation number decreases

2)

a)

HClO4:

H is +1

O is -2

Cl is +7

b)

C2O4 2-

O is -2

C is +3

I am allowed to answer only 1 question at a time

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