Question

Calculate the solubility of co2 in water at 298K under 760mm hg .kh=1.25*10raise to 6

Answer 1

Given:

kh=1.25*10raise to 6, water at 298K under 760mm hg

To find:

The solubility of co2 in water at 298K under 760mm hg

Solution:

Using Henry's law, we get,

P = kH × x

760 = 1.25 × 10⁶ × x

x = 760 / 1.25 × 10⁶

∴ x = 6.08 × 10⁻⁴

we know that,

x = no.of moles of solute / ( no.of moles of solute + no. of moles of water in 1 litre)

⇒ x = n / (n + 55.55)

As, moles of CO₂ less than moles of water

x ≈ n / 55.55

6.08 × 10⁻⁴ = n / 55.55

n = 6.08 × 10⁻⁴ × 55.55

n = 337.74 × 10⁻⁴

∴ n = 0.0337

Therefore, the solubility of co2 in water at 298K under 760mm hg is

0.0337 moles per liter

Answer 2

0.0337

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