OXIDATION-REDUCTION REA CTIONS CHM 1045L / CHM 1046L POST LAB EXERCISE NAME STD#
ID: 1032826 • Letter: O
Question
OXIDATION-REDUCTION REA CTIONS CHM 1045L / CHM 1046L POST LAB EXERCISE NAME STD# 1. Classify each substance as: DATE SEQUENCE # (1)OA (2) RA (3) Both Oxidizing agent Reducing agent Capable of acting either as RA or as OA. Fe*2 HNO, NH, Cu C· D" 2. The following hypothetical couples are tested: AayA, These observations are made: B., 18. ? (1) DBB2D (2) D2+ CNo reaction. (3) BAAB. Construct a reduction potential chart consistent with these observations. relative RA and OA strengths. Use arrows to indicate its salts according to the equation: Cu +2Ag- Cu2+2Ag in a similar fashion? Explain. -3 . Copper displaces Ag., from its salts according to the (1) will zn fashion? Explain (2) will H, react with Ag *" in a similar Exp. 18.13 18.13Explanation / Answer
1) ans:- Oxidising agent :- which has tendency to accept electrons.
Reducing agent:- has tendency to donate electrons.
Fe:- Fe is reducing agent, because Fe has tendency to donate electrons and carry two unit or three unit positive charge.
Fe^2+ :- Fe^2+ or Fe(II) is oxidising as well as reducing agent, because Fe(II) can donate 1 electron and form Fe(III) ion and also can accept electrons and form Fe atom.
MnO4^- :- is a strong oxidising agent , because in MnO4^- oxidation state of Mn is +7 (maximum) , therefore Mn has only tendency to accept electrons and thus behave as powerful oxidising agent.
Cu:- Oxidation state of Cu is 0 , therefore Cu is reducing agent , because Cu can only donate electrons.
S :- Sulphur is oxidising agent as well as reducing agent , because S has tendency to accept or donates electrons.
HNO2 :- both oxidising and reducing agent, because oxidation number of N is +3 , therefore HNO2 can accept as well as donate electrons.
H2O2:- act as both oxidising and reducing agent because oxidation number of oxygen in H2O2 is -1 i.e can accept as well as donate electrons.
NH3 :- Reducing agent , because nitrogen already has -3 oxidation state in ammonia.
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