constant for CO2 in water at this temperature i(3.1× 102 mm DClhieu and b) after
ID: 1084347 • Letter: C
Question
constant for CO2 in water at this temperature i(3.1× 102 mm DClhieu and b) after the ner a partial pressure of CO, in air is 0.0003 atm and that the Henry's law constent for the soft drínk is ne "flat" at 25°C ,' atm Assu me that same as that for water Strategy Use tee Eauation 13.3 and the given Henry's law constant to solve for the molar n (mol/L) of CO, at 25 C and the two CO, pressures given. At 25°C, the Henry's law constant for CO2 in water is 3.1 × 10° m1A-atm. c = (3.1 × 10-2 mol/L . atm)(5.0 atm) = 1.6 × 10" mol/L c = (3.1 × 10° mol/L-atm)(0.0003 atrn) = 9 × 10" mol/L Think About It With a pressure approximately 15,000 times concentration of CO, to be approximately 15,000 times smaller-and it is. smaller in part (b) than in part (a), we expect the Practice Problem ATTEMPT Calculate the concentration of CO,in water at 25'C when the pressure of Co, over the solution is 4.0 atm. Continued on next page)Explanation / Answer
Pressure of CO2 over the solution = 4.0 atm
At T = 25oC, KCO2 = 3.1*10-2mol/lt.atm
We know, concentration C = Kp = 3.1*10-2mol/lt.atm*4atm = 12.4*10-2mol/lt
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