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serious [3.7K]
2 years ago
15

A solution has a [OH-] of 1 x 10^-12 M. What is the [H3O+] of the solution?

Chemistry
1 answer:
Yakvenalex [24]2 years ago
4 0
First, lets find the pOH
pOH=-log[OH] ----> pOH=-log[1x10^-12] ----->pOH=12
Now we can find the pH
14-12=2
Now we can use the pH=-log[H3O] to find the hydrogen ion concentration
2=-log[H3O] ------>[H3O]=1.0 x 10^-2
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Answer:

1. 0.125 mole

2. 42.5 g

3. 0.61 mole

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1. Determination of the number of mole of NaOH.

Mass of NaOH = 5 g

Molar mass of NaOH = 23 + 16 + 1

= 40 g/mol

Mole of NaOH =?

Mole = mass /molar mass

Mole of NaOH = 5/40

Mole NaOH = 0.125 mole

2. Determination of the mass of NH₃.

Mole of NH₃ = 2.5 moles

Molar mass of NH₃ = 14 + (3×1)

= 14 + 3

= 17 g/mol

Mass of NH₃ =?

Mass = mole × molar mass

Mass of NH₃ = 2.5 × 17

Mass of NH₃ = 42.5 g

3. Determination of the number of mole of Ca(NO₃)₂.

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= 40 + 2[14 + 48]

= 40 + 2[62]

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= 164 g/mol

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Mole = mass /molar mass

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Mole of Ca(NO₃)₂ = 0.61 mole

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