what is the h⁺ concentration in a solution with a ph of 1.25? round to the nearest hundredth. \n× 10ⁿ m n=

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 $pH = 1.25$, we substitute it into the formula: $[H^{+}]=10^{- 1.25}$.

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, $0.056234 = 5.6234\times10^{-2}$. Rounding to the nearest hundredth, $[H^{+}]=5.62\times10^{-2}\ M$.

Answer:

$5.62$, $- 2$