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Please solve the problems base on the reactions number (7) and (8)

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Find Ky if [HC2H3O21 0.10; [H] [C2H3O2] 0.0010 7) Find K, if [HCN] 0.0010; [H] 0.010; [CN]-2.0x 10-8 (8.) Find [C2H3O2-] if [HC2H3O2] = 1.5 x 10-2. [H*) = 2.0x 10-3, Ki= 1.8 × 10-5 Find [H] if [HCN] 3.6x 10-3 and [CN]- [H K 5.8x 10-8 (8.) (7.) = 5.8 × 1
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