How would I do this? “ A buffer solution contains 0.400 mol dm-3 benzoic acid ( C6H6COOH) and 0.200 mol dm-3 sodium benzonate (C6H6COOH-Na+) at 25 degrees Celsius, Ka for benzoic acid is 6.40 X 10-5 mol
Calculate the pH of the buffer solution

the population of unionid mussels in the hudson river decreased after zebra mussels were introduced. zebra mussels, a nonnative species, competed with the unionid mussels for food. the zebra mussels were able to outcompete the unionid mussels, allowing the zebra mussel population to increase dramatically over six years. the unionid mussel population decreased due to a lack of food.

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