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? h+=log7.2 h+= -log7.2 h+=10^ -7.2 h+=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? h+=log7.2 h+= -log7.2 h+=10^ -7.2 h+=10^7.2

Answer

Explanation:

Step1: Given the pH formula

The formula for pH is $pH = -\log[H^+]$. We are given that $pH = 7.2$.

Step2: Rearrange the formula

Starting with $7.2=-\log[H^+]$, multiply both sides by - 1 to get $-7.2=\log[H^+]$.

Step3: Convert from logarithmic to exponential form

By the definition of logarithms, if $\log_{10}a = b$, then $a = 10^b$. Here, since the base of the common - logarithm is 10, when $\log[H^+]=-7.2$, we have $[H^+]=10^{-7.2}$.

Answer:

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