what is the h+ concentration in a solution with a ph of 1.25? round to the nearest hundredth. × 10^n m n=
what is the h+ concentration in a solution with a ph of 1.25? round to the nearest hundredth. × 10^n m n=
Answer
Explanation:
Step1: Recall pH formula
The formula for pH is $pH = -\log[H^+]$, where $[H^+]$ is the hydrogen - ion concentration. We can rewrite it to solve for $[H^+]$ as $[H^+]=10^{-pH}$.
Step2: Substitute pH value
Given $pH = 1.25$, then $[H^+]=10^{- 1.25}$.
Step3: Calculate the value
$10^{-1.25}=\frac{1}{10^{1.25}}$. Using a calculator, $10^{1.25}\approx17.782794$, so $\frac{1}{10^{1.25}}\approx0.056234$. In scientific - notation, $0.056234 = 5.62\times10^{-2}$.
Answer:
$5.62$, $- 2$