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The weak acid, HA has a Ka of 1.00×10^(−...

The weak acid, HA has a Ka of 1.00×`10^(−7)` . If 0.1 mol of this acid is dissolved in one litre of water, the percentage of acid dissociated at equilibrium is closet to:

A

1%

B

0.1%

C

100%

D

99%

Text Solution

Verified by Experts

Because oxidation `+2` is most stable for the later element of `3d` -series reducing agent include ions of the metals on the left of the series . Such ions include `V^(2+)`(aq) The `Fe^(2+)` (aq) ions is only weakly . The `CO^(2+) (aq)Ni^(2+)(aq)`, and `CU^(2+)(aq)` ions are not oxidized in water
`Fe^(3+ )undersetto(+0.77) Fe^(2+) undersetto(-0.44) Fe`
The chemical equation for the oxidation is then
`4Fe^(2+)(aq)+O_(2)(g)+4H^(+)(aq)to4Fe^(3+)(aq)+2H_(2)O(l)`
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