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The effect of absorption of `CO_(2)` gas on acidity of water is explained by following three equilibrium reactions. `CO_(2)gArrCO_(2(aq))` `CO_(2(aq))+H_(2)OhArrH_(aq)^(+)+HCO_(3(aq))^(-)` `HCO_(3(aq))^(-)+H_(2)OhArrH_(3)O_(aq)^(+)+CO_(3)^(2-)` Which of the following will increase the solubility of `CO_(2)` gas in water?A. increasing the temperatureB. increasing partial pressure of `CO_(2)` above waterC. addig `HNO_(3)` in waterD. Adding sodium acetate in water. |
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Answer» Correct Answer - B::D As T increases, solubility of gases in water decreases. `HNO_(3)` generates `H^(+)` ions which will suppress second ad third reaction, which in turn suppresses first reaction backward, decreasing solubility of `CO_(2)`. Sodium acetate generates `OH^(-)` ions due to hydrolysis of acetate, which will shift second and third reactions forward, increasing solubility of `CO_(2)` |
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