Question

The concentration of OH- ions in a solution with the H+ ions concentration of 1.3x10-4 M is

Answer 1

H3O+] = 3.8 x 10-3
pH = – log [H3O+] = – log (3.8 x 10-3)
= – (log 3.8 – 3 log 10)
= – log 3.8 + 3.0 = – 0.589 + 3 = 2.42
The pH of a sample of soft drink whose hydronium ion concentration is 3.8 x 10-3M is equal to 2.42

Answer 2

Answer:

[OH-]  * [H+] = 1 * 10^-14

[OH-] = (1 * 10^-14 / 1.3 * 10^-4) M

[OH-] = 7.7 *10^-11 M

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Explanation:

Product of hydrogen ion concentration and hydroxide ion concentration is equal to 1.0 x 10 ^-14 M in a solution.

M denotes Molar concentration.

Hope this helps.

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