Question

When the following equation is balanced properly under acidic conditions, what are the coefficients of the species shown?

_____ HNO₂ + _____ NiO₂ ----->____NO₃^- + ____ Ni²⁺

Water appears in the balanced equation as a _____ (reactant, product, neither) with a coefficient of _____. (Enter 0 for neither.)

How many electrons are transferred in this reaction? ______

Answer 1

Balanced redox equation is

HNO₂ + NiO₂ + H⁺ → NO₃^- + Ni²⁺ + H₂O

coefficients HNO₂ = 1; NiO2 = 1; NO₃^- = 1; and Ni²⁺ = 1

Water appears in the balanced equation as a __product___ (reactant, product, neither) with a coefficient of __1___.

How many electrons are transferred in this reaction? __2____ because the oxidation & reduction reactions are

HNO₂ + H₂O → NO₃^- + 3H⁺ + 2e^-

&

NiO₂ + 4H⁺ + 2e^- → H₂O + Ni²⁺ + H₂O repectively

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