Question

The pH of a solution changes from 3.00 to 6.00. By what factor does the [H3O+] change?

Answer 1

Answer: $10^3$

Explanation:-

pH is the measure of acidity or alkalinity. It is also defined as negative logarithm of hydrogen ion concentration.

$pH=-log[H_3O^+]$

Given: $pH$ = 3

Thus $3=-log[H_3O^+]$

$[H_1^+]=10^{-3}$

$6=-log[H_3O^+]$

$[H_3O^+]=10^{-6}$

$\frac{10^{-3}}{10^{-6}}=10^3$

Thus $H_3O^+$ changes by $10^3$ units.

Answer 2

:  E) 1000 = 10^3 
6-3 = 3 ==> change is 10^3
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