Problem: Indicate which reactions are redox reactions.(a) Hg2(NO3)2(aq) + 2 KBr(aq) → Hg2Br2(s) + 2 KNO3(aq)(b) 4 Al(s) + 3 O2(g) → 2 Al2O3(s)(c) CaO(s) + CO2(g) → CaCO3(s)
FREE Expert Solution
(a) Hg2(NO3)2(aq) + 2 KBr(aq) → Hg2Br2(s) + 2 KNO3(aq)
Reactants:
O.S. K = +1
O.S. Br = -1
O.S. O = -2
O.S. N = +5
O.S. Hg = +1
Products:
O.S. K = +1
O.S. Br = -1
O.S. O = -2
O.S. N = +5
O.S. Hg = +1
(b) 4 Al(s) + 3 O2(g) → 2 Al2O3(s)
Reactants:
O.S. Al = 0
O.S. O = 0
Products:
O.S. O = -2
O.S. Al = +3
Problem Details
Indicate which reactions are redox reactions.
(a) Hg2(NO3)2(aq) + 2 KBr(aq) → Hg2Br2(s) + 2 KNO3(aq)
(b) 4 Al(s) + 3 O2(g) → 2 Al2O3(s)
(c) CaO(s) + CO2(g) → CaCO3(s)
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What scientific concept do you need to know in order to solve this problem?
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