Question 3 pH expresses the molar concentration of hydronium ions in an aqueous

Question

Question 3 pH expresses the molar concentration of hydronium ions in an aqueous solution on a logarithmic scale. (Note that it is common to use the Not yet answered hydrogen ion, H, to represent the hydronium ion, H Points out of 1.00 PH Flag question As pH decreases, acidity increases. As pH increases, acidity decreases. Acidic solution: pH 7 What is the pH of an aqueous solution with the hydronium ion concentration: [H3O 4x 10 M? Provide your answor to the tonth of a pH unt. The pH of the ocean surface is about 8.1, although it does vary by location What is the molar concentration of [H3O ] if the ocean has a pH of 8.15? Provide your ana ef with three si rificant figurea. Answer may be in long form or scientific notation. The form of 0.123 in scientific rotation i 1.200.1, where .e. represents 10" and the number after the "e" io the exponent tom

Explanation / Answer

A)

[H3O+] = 4 x 10^-9M

-log[H3O+] = -log[ 4 x 10^-9]

PH = 8.398

PH=8.4

B) PH= 8.15

- log[H3O+] = 8.15

[H3O+] = 10^-8.15

[H3O+] = 7.08 x 10^-9 M

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