Use the pH scale to answer the question.
-What is the pH of a solution with a hydrogen ion concentration of 10-10 mole per liter? Is this solution an acid or a base?
A) $\mathrm { pH } = 4$; acid
B) $\mathrm { pH } = 10$; base
C) $\mathrm { pH } = 11$; base
D) $\mathrm { pH } = 7$; neutral

Question

Use the pH scale to answer the question.
-What is the pH of a solution with a hydrogen ion concentration of 10-10 mole per liter? Is this solution an acid or a base? 
A) $\mathrm { pH } = 4$; acid
B) $\mathrm { pH } = 10$; base
C) $\mathrm { pH } = 11$; base
D) $\mathrm { pH } = 7$; neutral

Quizplus · Accepted Answer

The pH is calculated as the negative logarithm (base 10) of the hydrogen ion concentration. For a concentration of $10^{-10}$ mole per liter, the pH is $ -\log(10^{-10}) = 10$. A pH greater than 7 indicates a basic solution.

Use the PH Scale to Answer the Question pH=4\mathrm { pH } = 4pH=4

Use the PH Scale to Answer the Question $\mathrm { pH } = 4$