1. Calculate the pH of a sample of orange juice whose concentration of hydrogen ions is 3.16x10^(-4) mol dm^(-3).
My solution: -log(3.16x10^(-4)) = 3.5003
2. The concentration of hydrogen ions in a bottle of wine is 3.20x10^(-4) mol dm^(-3). What is the pH of the wine?
My solution: -log(3.20x10^(-4) ) = 3.4949
Are my solutions correct? If they are wrong, please show me the correct working with details and explaination. Thank you!
find the pH of a sample
2009-12-14 7:32 am
回答 (1)
2009-12-14 9:21 am
✔ 最佳答案
The solutions are correct.However, too many significant figures are taken. Since the concentrations are in 3 significant figures, the answer o f pH should be at most in 3 significant figures, i.e. 3.50 and 3.49 respectively.
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