Problem: Chlorine is widely used to purify municipal water supplies and to treat swimming pool water. Suppose that the volume of a particular sample of Cl2 gas is 8.70 L at 895 torr and 24 oC.How many grams of Cl2 are in the sample?

FREE Expert Solution

Recall the ideal gas law equation:

Where:

P , pressure = 895 torr

n , number of moles, unknown

V , volume = 8.7 L

R, gas constant =

** Values for the gas constant can be found online or in textbooks 

T, temperature in K, but given: T = 24°C


To solve for grams of Cl2, we need to do these steps:

  1. Convert:
    • Temperature from °C to K
    • Pressure from torr to atm
  2. Solve for the molar mass of Cl2
  3. Solve for n, moles of Clusing Ideal Gas Law
  4. Do a mole to mass calculation 
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Problem Details

Chlorine is widely used to purify municipal water supplies and to treat swimming pool water. Suppose that the volume of a particular sample of Cl2 gas is 8.70 L at 895 torr and 24 oC.

How many grams of Cl2 are in the sample?