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Solution :

According to Henry's Law , C `prop P " or " C=kp,` where C is the concentration of the gas in the solution, P is the partial pressure of the gas and K is a constant. <br> (i) For freshly bottled soft drink at `0^(@)C` <br> `p=4.0 atm, k = 7.7 xx 10^(-2) mol L^(-1) atm^(-1)` <br> `:. C= kp = (7.7 xx 10^(-2) mol L^(-1) atm^(-1) ) xx (4.0 atm )=0.31 mol L^(-1)` <br> (ii) For opened soft dring at `25^(@)C` <br> `p=4.0 xx 10^(-4) atm, k = 3.2 xx 10^(-2) mol L^(-1) atm^(-1)` <br> `:. C=kp =(3.2 xx 10^(-2) mol L^(-1) atm^(-1)) xx (4.0 xx 10^(-4) atm) =1.3 xx 10^(-5) mol L^(-1)`