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mylen [45]
4 years ago
15

Determine the hydroxide ion concentration in a solution that is 0.018 m naoh.

Chemistry
1 answer:
nydimaria [60]4 years ago
5 0
As we know, NaOH is a strong Base and completely dissociates in water as given below,

                            NaOH + H₂O    →   Na⁺ ₍aq₎  +  OH⁻ ₍aq₎

So, the concentration of OH⁻ Ions will be the same as that the concentration of NaOH i.e. 0.018 M.
So,
                                     [OH⁻]  =  0.018 M
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A 35.00 mL sample of an H2SO4 solution of unknown concentration is titrated with a 0.1222 M KOH solution. A volume of 42.22 mL o
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Answer:

0.07 M

Explanation:

Given data:

Volume of H₂SO₄ = 35.00 mL  (35/1000 = 0.035 L)

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Molarity /concentration of H₂SO₄ = ?

Solution:

Chemical equation:

H₂SO₄  +  2KOH     →     K₂SO₄ + 2H₂O

Number of moles of KOH:

Molarity = number of moles / volume in L

0.1222 M = number of moles / 0.0422 L

0.0422 L×0.1222 M = number of moles

Number of moles = 0.005 mol

Now we will compare the moles of KOH with H₂SO₄ from balance chemical equation.

                      KOH               :            H₂SO₄

                         2                 :                 1

                    0.005              :            1/2×0.005 = 0.0025 mol

Concentration of H₂SO₄:

Molarity = number of moles / volume in L

Molarity = 0.0025 mol / 0.035 L

Molarity = 0.07 M

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