Question

A chemist is using a solution of HNO3 that has a pH of 3.75. What is [H+] for the solution? 1.78 × 10n M n =

Answer 1

Answer:

The concentration of $H^+$ ions in the solution is $1.778\times 10^{-4} M$.

Explanation:

The pH of the solution is defined as negative logarithm of $H^+$ ion concentration.

$pH=-\log[H^+]$

The pH of the nitric acid solution = 3.75

$3.75=-\log[H^+]$

$[H^+]=Antilog [-3.75]=0.0001778=1.778\times 10^{-4} M$

The concentration of $H^+$ ions in the solution is $1.778\times 10^{-4} M$.

Answer 2

Answer:

1st Question: 1.78 / -4

2nd Question: A

Explanation:

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