Question: A common measure for the acidity of a solution is its pH. It is defined by pH = -log [H+], where H+ measures the concentration

A common measure for the acidity of a solution is its pH. It is defined by pH = -log [H+], where H+ measures the concentration of hydrogen ions in the solution. The pH of pure water is 7. Solutions that are more acidic than pure water have a lower pH, while solutions that are less acidic (referred to as basic solutions) have a higher pH.
(a) Acid rain sometimes has a pH as low as 4. How much greater is the concentration of hydrogen ions in such rain than in pure water?
(b) A typical mixture of laundry soap and water for washing clothes has a pH of about 11, while black coffee has a pH of about 5. How much greater is the concentration of hydrogen ions in black coffee than in the laundry mixture?

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pH logH a For pure water 7 logH 7 logH 10 7 H For acid rain 4 logH 4 logH 10 4 H ... View full answer

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