If the concentration of CO2 is 2.90 g of CO2 per 1.00 L of soft drink when bottled under 2.0 atm of CO2 pressure, what will be the concentration of the CO2 in the drink after it has been opened and left to come to equilibrium with the atmosphere which has a CO2 partial pressure of 3.0 x 10-4 atm.

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Chemistry

15 September, 03:31

If the concentration of CO2 is 2.90 g of CO2 per 1.00 L of soft drink when bottled under 2.0 atm of CO2 pressure, what will be the concentration of the CO2 in the drink after it has been opened and left to come to equilibrium with the atmosphere which has a CO2 partial pressure of 3.0 x 10-4 atm.

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Skye Barron · Answer 1

Applying the ideal gas equation:

PV = nRT

PV = (m/Mr) RT

PMr/RT = m/V

Let m/V = C

At constant pressure,

P/C = constant

P₁/C₁ = P₂/C₂

2/2.9 = (3 x 10⁻⁴) (C₂)

C₂ = 4.35 x 10⁻⁴ g/L