Question

The concentration of hydroxyl ion in 0.1 M HCl solution is
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Answer 1

Answer:

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Answer 2

Answer:

the answer [OH-] = 10 raised to power of -13(negative 13)

Explanation:

Let me fix the temperature at 298K (kelvin).

As molarity of HCl is given 0.1 this means concentration i.e. no. of moles per volume is 0.1 for HCl and same will be for [H+]. As each molecule of HCl gives out 1 H+ ion on ionisation.

now let us come to the PH part

PH=log[H+]

=log(0.1). so PH = 1 (very acidic as per ph scale at 298K)

now we know at 298K P[H+] + P[OH-] = 14 ( as Kw = 10 raised to the power -14)

so P[OH-] = 13

so -log[OH-] = 13

and then the answer [OH-] = 10 raised to power of -13(negative 13)

concentration of OH- ion is so less that it can easily be neglected as compaired to H+ ion’s concentration.

Hopes it will help you.

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