The overall cell reaction occurring in an alkaline battery is Zn(s) + MnO2(s) + H2O(l) → ZnO(s) + Mn(OH)2(s) (a) How many moles of electrons flow per mole of reaction? (b) If 4.50 g of zinc is oxidized, how many grams of manganese dioxide and of water are consumed? (c) What is the total mass of reactants consumed in part (b)?
The overall cell reaction occurring in an alkaline battery is Zn(s) + MnO2(s) + H2O(l) → ZnO(s) + Mn(OH)2(s) (a) How many moles of electrons flow per mole of reaction? (b) If 4.50 g of zinc is oxidized, how many grams of manganese dioxide and of water are consumed? (c) What is the total mass of reactants consumed in part (b)?
Chemistry: Principles and Reactions
8th Edition
ISBN:9781305079373
Author:William L. Masterton, Cecile N. Hurley
Publisher:William L. Masterton, Cecile N. Hurley
Chapter17: Electrochemistry
Section: Chapter Questions
Problem 78QAP
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The overall cell reaction occurring in an alkaline battery is
Zn(s) + MnO2(s) + H2O(l) → ZnO(s) + Mn(OH)2(s)
(a) How many moles of electrons flow per mole of reaction?
(b) If 4.50 g of zinc is oxidized, how many grams of manganese dioxide and of water are consumed?
(c) What is the total mass of reactants consumed in part (b)?
(d) How many coulombs are produced in part (b)?
(e) In practice, voltaic cells of a given capacity (coulombs) are heavier than the calculation in part (c) indicates. Explain.
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