Need Some Help With this Logarithm Word Problem?

2016-08-03 4:34 am
The pH of the blood plasma of a certain animal is 7.2. Find the hydronium ion​ concentration, [H3O^+], of the blood plasma.

Use this formula pH= -log[H30^+].

​(Use scientific notation. Use the multiplication symbol in the math palette as needed. Round to the nearest tenth as​ needed.)

回答 (1)

2016-08-03 4:43 am
pH = -log[H₃O⁺]

When pH = 7.2 :
-log[H₃O⁺] = 7.2
log[H₃O⁺] = -7.2
Then, [H₃O⁺] = 10⁻⁷·² = 6.3 × 10⁻⁸ M


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