Answered: A student uses a strip of metal in an…

Principles of Modern Chemistry

8th Edition

ISBN:9781305079113

Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Chapter17: Electrochemistry

Section: Chapter Questions

Problem 76AP

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Question

A student uses a strip of metal in an electrolysis circuit in which the metal strip serves as the anode and is connected to the positive terminal of a power supply. The negative terminal of the power supply is connected to an insulated copper wire. An ammeter is placed in the circuit and the power supply is turned on. A current of 1.13 A flows for 5 min and 50 sec. During this time the mass loss of the metal is 0.109 g. What is the molar mass of the metal?

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Step 1

$\begin{array}{rcl} G i v e n d a t a, \\ C u r r e n t & = & 1.13 A \\ T i m e & = & 5 m i n 50 s e c \\ 1 m i n & = & 60 s e c \\ 5 m i n & = & 5 \times 60 \\ = & 300 s e c \\ t i m e & = & 350 s e c \\ M a s s o f m e t a l & = & 0.109 g \end{array}$

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