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Answered

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What is the OH- ion concentration, in moles per liter, of an aqueous solution with a pH of 7?

A. 1 × 10-14

B. 1 × 10-7

C. 7

D. 14

Sagot :

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Answer:

B

Explanation:

the pH scale is based on the function

1x10-14

So since pH is neutral the concentration of OH and H must be equal hence the only option in which the concetration would [OH]{H}= 1x10-14 would be when both are equal so it cannot be a or d and when they are expressed in concetration so the only option is B.

The pH of the solution can be used to give the relation between the pOH and the hydroxide ion concentration. The concentration of hydroxide ions is 1 ×10⁻⁷. Thus, option B is correct.

What is pOH?

pOH is the measure of the hydroxide ion in the solution. The hydroxide concentration from pH is related as:

pH = - log [H⁺]

[H⁺] = 10⁻⁷

= 1 × 10⁻⁷

The hydroxide concentration from hydrogen concentration is calculated as:

[H⁺][OH⁻] = 1 × 10⁻¹⁴

[OH⁻] = (1 × 10⁻¹⁴) ÷ (1 × 10⁻⁷)

= 1 ×10⁻⁷

Therefore, option B. 1 ×10⁻⁷ is the hydroxide ion concentration.

Learn more about hydroxide concentration here:

https://brainly.com/question/22938758

#SPJ2

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