$10$:$49$

Date:

Name$($s$)$:

e$.Al+O{H}^{-}Al{O}_2^{-}+H_2($basic conditions$)$

f$.Cu(N{H}_3{)}_4^{2+}+S_2{O}_4^{2-}S{O}_3^{2-}+Cu+N{H}_3($basic conditions$)$

$4$ of $4$

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