Question

URGENT !!!

What is the pH of a solution with a concentration of 4.2 × 10−5 M H3O+? (4 points)
2.31
4.38
5.62
6.87

Answer 1

Answer:

${ \tt{pH = - log[H {}^{ + } ]}} \\ pH = - log(4.2 \times {10}^{ - 5} ) \\ pH = 4.38$

Step-by-step explanation:

H

Answer 2

pH of a solution is 4.38

What is pH of a solution ?

"The pH of a solution refers to the strength of solution whether it is acidic or basic in nature It is considered by the concentration of hydrogen ion in the solution."

We have,

Concentration of $4.2$×$10^{-5}$$MH_{3}O$

pH = $-log(H^{+})$

⇒pH = $-log(4.2$×$10^{-5})$

⇒pH = 4.38

∴ pH of a solution is 4.38

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