So if we're going to be writing our equilibrium constant in terms of mole fractions, we're going to need mole fractions.
所以如果我们把平衡常数写作,摩尔分数的函数,我们需要知道摩尔分数。
2
Writing at equilibrium that the change in the concentration of one of the species is equal to zero, we're going to use that as an approximation also later, when we get to more complicated mechanisms.