Question

Household bleach which has a ph of 12.6 has more hydroxide (oh-) ions than lye which has a ph of 13.

Answer 1

Answer:

Household bleach has more hydroxide ions than lye.

Explanation:

The pH of the solution id the negative logarithm of hydrogen ion concentration in an aqueous solution.

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

• Higher the pH value lessor the hydrogen ion concentration in the solution. Higher will be the concentration of hydroxide ions
• Lower the pH value higher the hydrogen ion concentration in the solution.Lower will be the concentration of hydroxide ions.

The pH of the household bleach = 12.6

$12.6=-\log[H^+]$

$[H^+]=2.511\times 10^{-13} M$

The pH of the lye= 13

$13=-\log[H^+]$

$[H^+]= 10^{-13} M$

Since , house hold bleach has the lower pH than lye which means that it will have higher concentration of hydroxide ions.

Answer 2

Answer is: false, concentration of hydroxide ions is greater in lye than in household bleach.

1) pH = 12.6.

pH + pOH = 14.

pOH = 14 - 12.6.

pOH = 1.4.

pOH = -log[OH⁻] ⇒ [OH⁻] = 10∧(-pOH).

[OH⁻] = 10∧(-1.4) = 0.039 M; concentration of hydroxide ions.

2) pH = 13.

pOH = 14 - 13.

pOH = 1.

[OH⁻] = 10⁻¹ M = 0.1 M.

0.1 M > 0.039 M.