Problem: A river is contaminated with 0.65 mg/L of dichloroethylene (C2H2Cl2). What is the concentration (in ng/L) of dichloroethylene at 21°C in the air breathed by a person swimming in the river (kH for C2H2Cl2 in water is 0.033 mol/L·atm)? 

FREE Expert Solution

Recall that the solubility of a gas is given by Henry’s law:


Sgas=kH·Pgas


Molarity (M)=moles of soluteLiters of solution 


Molar mass of C2H2Cl= 96.94 g/mol


SC2H2Cl2=0.65 mg1 L×10-3 g1 mg×1 mol C2H2Cl2 96.94 g C2H2Cl2


SC2H2Cl2=6.705 x 10-6 mol/ L

96% (97 ratings)
View Complete Written Solution
Problem Details

A river is contaminated with 0.65 mg/L of dichloroethylene (C2H2Cl2). What is the concentration (in ng/L) of dichloroethylene at 21°C in the air breathed by a person swimming in the river (kH for C2H2Cl2 in water is 0.033 mol/L·atm)? 

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Henry's Law concept. You can view video lessons to learn Henry's Law. Or if you need more Henry's Law practice, you can also practice Henry's Law practice problems.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Raineri's class at SUNY.

What textbook is this problem found in?

Our data indicates that this problem or a close variation was asked in Chemistry: The Molecular Nature of Matter and Change - Silberberg 8th Edition. You can also practice Chemistry: The Molecular Nature of Matter and Change - Silberberg 8th Edition practice problems.