Question

The concentration of CO${}_2$ in a soft drink bottled with a partial pressure of CO${}_2$ of 4.0 atm over the liquid at 25${}^o$C is $1.2\times {10}^{-1}$M. The Henry's law constant for $C{O}_2$ at this temperature is ____________.

• A. $3.0\times {10}^{-2}mol/L-atm$
• B. $4.5\times {10}^{-3}mol/L-atm$
• C. $5.6\times {10}^{-3}mol/L-atm$
• D. $2.3\times {10}^{-2}mol/L-atm$
• E. More information is needed to solve the problem.

Answer 1

The correct option is A $3.0\times {10}^{-2}mol/L-atm$

According to Henry's law, $S=KP$

S is the solubility in moles per litre
K is the henry's law constant
P is the pressure in atm.

Substitute values in the above expression.

$1.2\times {10}^{-1}=K_H\times 4atm$

$K_H=3.0\times {10}^{-2}mol/Latm$

Option A is correct.