Answer
Al is negative
Ni is positive
Work Step by Step
Al (s) is releasing electron and Ni (s) is accepting electrons (see half reactions in part (b))
Chemistry: The Central Science (13th Edition)
by Brown, Theodore E.; LeMay, H. Eugene; Bursten, Bruce E.; Murphy, Catherine; Woodward, Patrick; Stoltzfus, Matthew E.
Published by
Prentice Hall
ISBN 10:
0321910419
ISBN 13:
978-0-32191-041-7
Chapter 20 - Electrochemistry - Exercises - Page 901: 20.30d
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