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A diprotic acid H2X\text{H}_2\text{X}H2X has K1=2.0⋅10−6K_1 = 2.0\cdot 10^{-6}K1=2.0⋅10−6 and K2=5.0⋅10−8K_2 = 5.0\cdot 10^{-8}K2=5.0⋅10−8.
If this acid is present in a solution of pH =7\text{pH } = 7pH =7, determine the ratio [X2−][H2X].\dfrac{[\text{X}^{2-}]}{[\text{H}_2\text{X}]}.[H2X][X2−].
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