Ka and pH calculations for weak acids can be trick on the MCAT if you attempt a general chemistry approach.
Ice tables and quadratic equations are not only a waste of time, but nearly impossible without a calculator.
This video shows you my shortcut for skipping the ICE chart and skipping the quadratic equation for weak acid calculations.
Resources mentioned in this video:
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This is video 4 in the MCAT Acid Base series. Catch the entire series HERE