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Calculate the sulfide ion concentration in a saturated H2S solution when the ph is 0.5. The...

Calculate the sulfide ion concentration in a saturated H2S solution when the ph is 0.5.
The concentration of H2S in a saturated H2S solution is about 0.1 mol/L.

H2S(aq) + 2H20 (l) -----> 2H30+ (aq) + S2- (aq)

Ka = 1.1 x 10 ^-21

Solutions

Expert Solution

pH = 0.5

[H2S] = 0.1 mol/L = 0.1M

                 

Initial             0.1                                                                 0                         0

Final            (0.1 - x)                                                          (2x + 0.3010)         x


assuming 0.1 - x = 0.1 and (2x + 0.3010 = 0.3010) [ since x is very small value]

Hence the sulfide ion concentration is equal to 1.214 * 10^(-21)

queen_honey_blossom answered 5 months ago
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