Henry's law for water is 2.85 x 10 (-4) M / ATM. If the air is 21% GR oxyg many grams of O2?
HELP !!!!!!!! Henry law constant for oxygen solubility in water is 2.85 x 10 (-4) M / ATM. If the air is 21% oxygen, how many grams of O2 is dissolved in a tank 40 liters of fish?
The coefficient Henry's law, K, says that the concentration, C (moles / liter = molar = M) of a gas in equilibrium with a pressure partially given, P of the gas: C ratios of Law = k * P Henry are functions of temperature, and when a specific value is given, you must also specify the temperature to which that value applies. Here, because the air is 21% oxygen partial pressure of oxygen in air is 0.21 atm. In terms of moles per liter, then O2 concentration in the water) whatever the temperature of the given value of Henry's Law is for Coefficiet): C = (2.85 * 10 ^ -4 M / ATM) liters * (0.21 atm) = 5.985 * 10 ^ -5 M 40 water with this concentration of O2 containing 40 liters * 5.985 * 10 ^ -5 mol / liter = 2.394 * 10 ^ -3 mol O2 The molecular mass of gas O2 is 32.00 g / mol, so this moles of O2 would have a mass of 2.394 * 10 ^ -3 mol O2 * 32.00 g / mol = 7.66 * 10 ^ -2 g
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