Round your answer to the nearest tenth, when appropriate. Use the formula $\mathrm { pH } = - \log \left[ \mathrm { H } _ { 3 } \mathrm { O } ^ { + } \right]$ , as
needed.
-Find the $\mathrm { pH } \text { if } \left[ \mathrm { H } _ { 3 } \mathrm { O } ^ { + } \right] = 6.7 \times 10 ^ { - 5 }$
A) - 5.8
B) 4.2
C) 5.8
D) 4.6

Question

Quizplus · Accepted Answer

To find the pH, use the formula $ \mathrm { pH } = - \log \left[ \mathrm { H } _ { 3 } \mathrm { O } ^ { + } \right] $. Plugging in $ \left[ \mathrm { H } _ { 3 } \mathrm { O } ^ { + } \right] = 6.7 \times 10 ^ { - 5 } $, the calculation gives a pH of approximately 4.2.

Round Your Answer to the Nearest Tenth, When Appropriate pH=−log⁡[H3O+]\mathrm { pH } = - \log \left[ \mathrm { H } _ { 3 } \mathrm { O } ^ { + } \right]pH=−log[H3​O+]

Round Your Answer to the Nearest Tenth, When Appropriate $\mathrm { pH } = - \log \left[ \mathrm { H } _ { 3 } \mathrm { O } ^ { + } \right]$