1. When the following equation is balanced properly under basic conditions, what
ID: 1038688 • Letter: 1
Question
1. When the following equation is balanced properly under basic conditions, what are the coefficients of the species shown?
_____Br2 + ______N2H4--------> ______BrO3- + _______NH3
Water appears in the balanced equation as a ________ (reactant, product, neither) with a coefficient of______ . (Enter 0 for neither.)
Which ELEMENT is reduced? _______
2. When the following equation is balanced properly under acidic conditions, what are the coefficients of the species shown?
____Cu + _____ClO3- -----> _____Cu2++ _____ClO2
Water appears in the balanced equation as a _________ (reactant, product, neither) with a coefficient of ______. (Enter 0 for neither.)
Which ELEMENT is reduced?
3. When the following skeletal equation is balanced under acidic conditions, what are the coefficients of the species shown?
_____Sn + ______Cu2+ ---->_____Sn2+ +_______ Cu
Water appears in the balanced equation as a _______ (reactant, product, neither) with a coefficient of _________ . (Enter 0 for neither.)
Which SPECIES is the oxidizing agent?
4. When the following skeletal equation is balanced under basic conditions, what are the coefficients of the species shown?
_______SO32-+ ______F- -------> _____ S2O32-+ _____F2
Water appears in the balanced equation as a ______(reactant, product, neither) with a coefficient of_________ . (Enter 0 for neither.)
Which SPECIES is the oxidizing agent?
5. When the following equation is balanced properly under basic conditions, what are the coefficients of the species shown?
_____NO2- + _____PH3-----> _____P + ______N2O
Water appears in the balanced equation as a _______ (reactant, product, neither) with a coefficient of _______ . (Enter 0 for neither.)
Which ELEMENT is reduced?
6.
When the following skeletal equation is balanced under basic conditions, what are the coefficients of the species shown?
_______HXeO4-+ _______SO32- -------> _____SO42-+ _____Xe
Water appears in the balanced equation as a ________ (reactant, product, neither) with a coefficient of _____ . (Enter 0 for neither.)
Which SPECIES is the reducing agent?
Explanation / Answer
1. Br2 + N2H4 + 6H2O + OH- ----> 2BrO3- + 2NH3 + 7H+ + 2H2O
Br2 + N2H4 + 4H2O + OH- ----> 2BrO3- + 2NH3 + 7H+
From the balanced equation, it can now be inferred that water occurs as the reactant in the reaction with a coefficient of four.
In this reaction, while Br goes from 0 to +5 being oxidised, N goes from -2 to -3 thus being reduced by addition of electrons.
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