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WAEC Chemistry 2021 Paper

Question : 28

Total: 50

Solution:

Concept:

Silver ion is monovalent:

\mathrm{Ag}^+ + e^- \rightarrow \mathrm{Ag}

, so 1 mole of Ag requires 1 mole of electrons, which carries 96500 C.

Explanation:

Moles of Ag liberated =

\frac{1.08}{108} = 0.01

mol

Charge needed for 1 mole of Ag = 96500 C

Charge needed for 0.01 mole =

0.01 \times 96500 = 965

Answer:

965 C

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