Question

ph measures the acidity of a substance, and is described by the equation ph = - log (h+), where h+ is the concentration of hydrogen ions. the table below characterizes the acidity or basicity of a substance based on its ph.

ph	acidity	basic	neutral	acidic

a substance has an h+ concentration of 1 × 10^-7. find its ph, then determine if it is basic, neutral, or acidic.
ph =
the substance is

Explanation:

Step1: Recall pH formula

$pH =-\log[H^{+}]$

Step2: Substitute given $H^{+}$ concentration

Given $[H^{+}]=1\times 10^{-7}$. Then $pH =-\log(1\times 10^{-7})$.

Step3: Calculate the logarithm

We know that $\log(1\times 10^{-7})=- 7$ (since $\log(a\times10^{n})=n$ when $a = 1$ in base - 10 logarithm). So $pH=-(-7)=7$.

Answer:

7