Question

in chemistry, ph is a logarithmic scale used to specify the acidity or basicity of solutions. the ph scale acid neutral base ph = -logh+ in this equation, h+ is the hydrogen - ion concentration. find the hydrogen ion concentration of a substance with a ph of 11.3. write the answer in scientific notation.

Explanation:

Step1: Given the pH formula

$pH = -\log[H^+]$, and $pH = 11.3$.

Step2: Rearrange the formula to solve for $[H^+]$

We get $[H^+]=10^{-pH}$.

Step3: Substitute the pH value

Substitute $pH = 11.3$ into the formula: $[H^+]=10^{- 11.3}$.

Step4: Express in scientific - notation

$10^{-11.3}=5.01\times10^{-12}$ (since $10^{-11.3}=10^{0.7}\times10^{-12}$, and $10^{0.7}\approx5.01$).

Answer:

$5.01\times10^{-12}$