The cost of discharging 6.0g of a divalent metal, X from its salt is ₦12.00. What is the cost of discharging 9.0g of a trivalent metal, Y from its salt unde...

Assessment: JAMB UTME - Chemistry - 2019 Subject: Chemistry

Question 1 Report

The cost of discharging 6.0g of a divalent metal, X from its salt is ₦12.00. What is the cost of discharging 9.0g of a trivalent metal, Y from its salt under the same condition?

[X = 63, Y = 27, 1F = 96,500C]

N12.00

N27.00

N63.00

N95.00

Answer Details

For X: X

^{2 +}

+ 2e

^{-}

\to

X
2F = 63g
xF = 6g
x =

\frac{6 \times 2}{63} = \frac{4}{21} F

\frac{4}{21}

F = N12.00
1F =

\frac{12}{\frac{4}{21}}

= N63.00
1F is equivalent to N63.00.
For Y: Y

^{3 +}

+ 3e

^{-}

\to

Y
3F = 27g
xF = 9g
x =

\frac{3 \times 9}{27}

= 1F
1F = N63.00

Read lesson note on Chemical Combination (JAMB)

Chemical Combination

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The cost of discharging 6.0g of a divalent metal, X from its salt is ₦12.00. What is the cost of discharging 9.0g of a trivalent metal, Y from its salt unde...

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