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Hydroxyl ion concentration of 1M HCl is?

Hydroxyl ion concentration of 1M HCl is?

Grade:11

2 Answers

Saurabh Koranglekar
askIITians Faculty 10341 Points
one year ago
576-121_1.PNG
Vikas TU
14149 Points
one year ago

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.

Thank you

Hope you are satisfied by the answer.

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