The Henry's Law constant for CO2 is 3.4 x 10-2 M/atm at 25°C. What pressure of...

The Henry's Law constant for CO2 is 3.4 x 10-2 M/atm at 25°C. What pressure of carbon dioxide is needed to maintain a CO2 concentration of 0.10 M in a can of soda?

Expert Solution

Ans. Following Henry’s Law, the concertation of a gas in liquid phase is given by-

C_gas = K_H x P_gas

Where, Cgas = concentration of gas in terms of molarity

K_H = Henry’s constant for the gas for specified temperature and liquid.

Pgas = Pressure of gas

Putting the values in above equation-

0.10 M = (3.4 x 10^-2 M atm^-1) x Pgas

Or, Pgas = 0.10 M / (3.4 x 10^-2 M atm^-1) = 2.94 atm

Therefore, required pressure of CO₂ in the soda can = 2.94 atm

queen_honey_blossom answered 2 years ago

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