Question

What is the ph of an acid having h+=10^-3

Answer 1

pH = -log [ H⁺]

pH = -log [10⁻³]          ( log 10ᵃ = a)

pH = -(-3)

pH = 3

Answer 2

The pH of an acid having [$H^+$] = $10^{-3}$ M is found out as follows.

Given:

The [$H^+$] ion concentration of a given acid = $10^{-3}$ M.

To Find:

We have to find out the pH of an acid that has an [$H^+$] ion concentration of  $10^{-3}$ M.

Solution:

We know that,

pH = - ㏒ [$H^+$].

Substituting the value for [$H^+$], we get

pH = - ㏒ [$10^{-3}$]

Since ㏒ [$10^{a}$] = a, the above equation becomes

pH = - (-3) = +3.

Hence, the pH of an acid having [$H^+$] = $10^{-3}$ M is 3.

#SPJ2