the equation for the ph of a substance is ph = -logh+, where h+ is the concentration of hydrogen ions. what…

the equation for the ph of a substance is ph = -logh+, where h+ is the concentration of hydrogen ions. what is the approximate ph of a solution whose hydrogen ion concentration is 2×10^(-9)?\n1.0\n2.9\n8.7\n9.3

the equation for the ph of a substance is ph = -logh+, where h+ is the concentration of hydrogen ions. what is the approximate ph of a solution whose hydrogen ion concentration is 2×10^(-9)?\n1.0\n2.9\n8.7\n9.3

Answer

Answer:

C. 8.7

Explanation:

Step1: Substitute the value of [H+]

Given [H+] = 2×10⁻⁹, substitute into pH = -log[H+]. So pH = -log(2×10⁻⁹).

Step2: Use logarithm property

By the logarithm property log(ab)=log(a)+log(b), we have -log(2×10⁻⁹)=-(log(2)+log(10⁻⁹)).

Step3: Evaluate log values

We know that log(2)≈0.3010 and log(10⁻⁹)= - 9. Then -(log(2)+log(10⁻⁹))=-(0.3010 - 9).

Step4: Simplify the expression

-(0.3010 - 9)=9 - 0.3010 = 8.699≈8.7.