Question

PH is a measure of the hydrogen ion concentration of a solution. It is defined as the negative logarithm of the hydrogen ion concentration. The equation is:

pH = - log [H+] 

If an acid has an H+ concentration of 10-7, find the pH?

Answer 1

The average pH today is 8.1, with 7.9 × 10-9 moles per liter of hydrogen ions. The original average pH was 8.2, with 6.3 × 10-9 moles per liter of hydrogen ions.

Using the formula, the percent increase in the number of hydrogen ions from then to now would be computed this way:

hydrogen ion concentration and acidity of the ocean has increased by 25%.

Explanation:

Answer 2

`\bf \textit{Logarithm of exponentials} \\\\ log_a\left( x^b \right)\implies b\cdot log_a(x) \\\\\\ \textit{Logarithm Cancellation Rules} \\\\ \underline{log_a a^x = x}\qquad \qquad a^(log_a x)=x \\\\ -------------------------------\\\\ pH=-log(H+)\qquad \boxed{H+=10^(-7)}\qquad pH=-log_(10)\left( 10^(-7) \right) \\\\\\ pH=-(-7)log_(10)(10)\implies pH=7\cdot 1\implies pH=7`