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Part A
What is the pH of an aqueous solution with [H3O+]=2×10−14 M?
Express the pH numerically using one decimal place.
Part B
Carbonated cola is more acidic than coffee or even orange juice because cola contains phosphoric acid.
What is the molar concentration of H3O+ in a cola that has a pH of 3.120?
Express the molar concentration numerically using three significant figures.

Respuesta :

joseaaronlara

Answer:

The answer to your question is below

Explanation:

A.

[H₃O⁺] = 2 x 10⁻¹⁴ M

pH = ?

Formula

                                    pH = - log [H₃O⁺]

Substitution

                                    pH = - log [2 x 10⁻¹⁴]

Result

                                    pH = 13.7          

B.

[H₃O⁺] = ?

pH = 3.12

Formula

                                   pH = - log [H₃O⁺]

Substitution

                                   3.12 = - log [H₃O⁺]

                                   [tex]10^{-3.12} = [H_{3} O^{+}][/tex]

Result

                                  [H₃O⁺] = 7.59 M

   

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