99 Percentile Qs Bank for JEE MainChemistrySolutions
At T( ~K ) the molarity of CO ₂ (in mol L ⁻¹ ) in 200 mL of soda water packed under a pressure of 3.4 bar is (K_ H . of CO ₂ in water is 1.7 10^3 bar at T( ~K ))
Options
- A2.0 10⁻²
- B1.11 10⁻¹
- C2.22 10⁻¹
- D5.1 10⁻²
Correct answer
B. 1.11 10⁻¹
Step-by-step solution
Given, volume =200 ~mL pressure, p=3.4 bar K_ H of CO ₂ in water =1.7 10^3 bar According to Henry's law, p_ CO ₂ =K_ H = p_ CO ₂ K_ H n_ CO ₂ 18 200 = 3.4 1.7 10^3 n_ CO ₂ = 2 10⁻³ 200 18 =22.22 10⁻³ Molarity = Number of mole of solute Volume aligned & = 22.22 10⁻³ 200 10⁻³ =0.1111 & =1.11 10⁻¹ ~mol ~L ⁻¹ aligned