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Lina20 [59]
3 years ago
6

One can find the pH of a substance by using ___.

Chemistry
2 answers:
Scorpion4ik [409]3 years ago
5 0
D, litmus paper indicator
Arisa [49]3 years ago
5 0

Explanation:

C. Plain paper indicator.

Litmus paper indcator can only tell you if the solution is acidic/neutral/alkaline, but not to what extent.

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Calculate the concentration of an aqueous solution of naoh that has a ph of 11.50
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NaOH is a strong base and complete dissociation into Na⁺ and OH⁻ ions. 
Therefore [NaOH] = [OH⁻]
To calculate the [OH⁻], we can first find the pOH as NaOH is a basic solution.
pH + pOH = 14
Since pH = 11.50
pOH = 14 - 11.50
pOH = 2.50
We can calculate [OH⁻] by knowing pOH 
pOH = -log[OH⁻]
[OH⁻] = antilog(-pOH)
[OH⁻] = 3.2 x 10⁻³ M
therefore [NaOH] = 3.2 x 10⁻³ M
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