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+ = 10^(7.2)

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+ = 10^(7.2)

Answer

Explanation:

Step1: Start with given formula

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

Step2: Isolate the log - term

Multiply both sides by - 1, we get $\log[H^+]=-7.2$.

Step3: Convert from logarithmic to exponential form

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

Answer:

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