the equation for the ph of a substance is ph = -logh⁺, where h⁺ is the concentration of hydrogen ions. which…

the equation for the ph of a substance is ph = -logh⁺, where h⁺ is the concentration of hydrogen ions. which equation models the concentration of hydrogen ions (h⁺) of a solution whose ph is 7.2?\nh⁺ = log7.2\nh⁺ = -log7.2\nh⁺ = 10⁻⁷.²\nh⁺ = 10⁷.²

the equation for the ph of a substance is ph = -logh⁺, where h⁺ is the concentration of hydrogen ions. which equation models the concentration of hydrogen ions (h⁺) of a solution whose ph is 7.2?\nh⁺ = log7.2\nh⁺ = -log7.2\nh⁺ = 10⁻⁷.²\nh⁺ = 10⁷.²

Answer

Explanation:

Step1: Given the pH formula

Given $pH = -\log[H^+]$, and $pH = 7.2$.

Step2: Rearrange the formula

We have $7.2=-\log[H^+]$, then $\log[H^+]= - 7.2$.

Step3: Use the inverse - log property

By the definition of logarithms, if $\log a = b$, then $a = 10^b$. So $[H^+]=10^{-7.2}$.

Answer:

$[H^+]=10^{-7.2}$ (corresponding to the third option)