Imagine that 27.0 g of C2H2(g) dissolves in 1.00 L of liquid acetone at 1.00 atm pressure. If the partial pressure of C2H2(g) is increased to 12.0 atm, what is its solubility in acetone?

Answer :

Answer: The solubility of [tex]C_2H_2(g)[/tex] at 12.0 atm is [tex]324g/1.00L[/tex]

Explanation:

We are given:

Mass of [tex]C_2H_2(g)[/tex] = 27.0 grams

Volume of liquid acetone = 1.00 L

Solubility of [tex]C_2H_2(g)[/tex] in liquid acetone at 1.00 atm = 27.0 g / 1.00  L

To calculate the molar solubility, we use the equation given by Henry's law, which is:

[tex]C_{A}=K_H\times p_{A}[/tex]

Or,

[tex]\frac{C_{1}}{C_{2}}=\frac{p_{1}}{p_2}[/tex]

where,

[tex]C_1\text{ and }p_1[/tex] are the initial concentration and partial pressure of [tex]C_2H_2(g)[/tex]

[tex]C_2\text{ and }p_2[/tex] are the final concentration and partial pressure of [tex]C_2H_2(g)[/tex]

We are given:

[tex]C_1=27.0g/1.00L\\p_1=1.00atm\\C_2=?\\p_2=12.0atm[/tex]

Putting values in above equation, we get:

[tex]\frac{27.0g/1.00L}{C_2}=\frac{1.00atm}{12.0atm}\\\\C_2=\frac{27.0g/1.00L\times 12.0atm}{1.00atm}=324g/1.00L[/tex]

Hence, the solubility of [tex]C_2H_2(g)[/tex] at 12.0 atm is [tex]324g/1.00L[/tex]

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