The pH of a liquid is a measure of how acidic or basic it is. The concentration of hydrogen ions in a liquid is labeled [H+]. Use the formula pH = –log[H+] to find the pH level, to the nearest tenth, of a liquid with [H+] about 6.2 x 10^–14.
A) -14.8
B) 14.8
C) 13.2
D) -13.2

The answer to your question is the letter C) 13.2

Explanation:

Data

pH = ?

[H⁺] = 6.2 x 10⁻¹⁴

Process

As is mentioned in the description, pH determines the concentration of H⁺ in a solution. The scale of pH goes from 0 to 14. A solution is acidic if the pH is between 0 and 6.9. The solution is neutral if the pH is 7. And a solution is basic if the pH is between 7.1 and 14.

Formula

pH = -log [H⁺]

Substitution

pH = -log[6.2 x 10⁻¹⁴]

Simplification

pH = -(-13.2)

Result

pH = 13.2

substituting a hydrogen atom with a halogen in a hydrocarbon:

- the single bond remains single. a is wrong.

- the bond with hydrogen is as strong as with a halogen. c is wrong

- a hydrocarbon is saturated if there is no double bond. we do not know that so d is wrong.

- carbon will always have four valence electrons. e is wrong.

by elimination, the correct answer is b. the boiling point of the new compound increases.