3 years ago

QUESTION 3

Chemistry

1 answer:

ddd [48]3 years ago

5 0

Answer:

Different visible waves show different colors

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Purification of nickel can be achieved by electrorefining nickel from an impure nickel anode onto a pure nickel cathode in an el

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Answer: 530 hours

Explanation:

The reduction of Nickel ions to nickel is shown as:

$Ni^{2+}+2e^-\rightarrow Ni$

$96500\times 2=193000Coloumb$ of electricity deposits 1 mole of Nickel

1 mole of Nickel weighs = 58.7 g

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t= time in seconds = ?

$59182282.8C=31.0A\times t$

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$t=530hours$

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