Question

16. The absorption coefficient of O2 in seawater at 0°C is 1.7 mmol/L. What is the concentration of O2 if the O2 partial pressure is 0.1 atm? Express your answer first in mmol/L, and then in mL/L. For this question, it is easy to get the mmol/L of oxygen. To convert mmol/L to mL/L, recall that dissolved gas is expressed as a volume of gas if it were removed from solution. So you need to use the ideal gas law to get the volume of gas in mL (per L of water, as given in the question). You need to look up (e.g., online) a value of R in the correct units (the value of R in the footnote on p. 570 is in incorrect units for this problem). There are also more complicated ways to answer this question, but you don’t have to use them.

Need to use the equations Cx = SxPx (C = concentration, S = solubility, P = partial pressure, x = gas) and PV = nRT

Answer 1