What is the pH of the resulting solution when equal volumes of 0.1 M NaOH and 0.01 M HCl are mixed ?

  • Option 1)

    12.65

  • Option 2)

    2.0

  • Option 3)

    7.0

  • Option 4)

    1.04

 

Answers (1)

As we learnt in concept

Value of p(H) -

Acidic solution has p(H)  < 7

Basic solution has  p(H)  > 7

Neutral solution has p(H) = 7

-

 

 Let volume of each solution be 1L

moles of NaOH=0.1ml

moles of HCl=0.01ml

moles of NaoH left after mixing =0.09ml

Malarity =normality (as n=1)=\frac{0.09}{2}=0.045 M\:or\: 0.045N

POH=-log (0.045) =1.35 PH=14-POH=14-1.35=12.65


Option 1)

12.65

This Solution is correct 

Option 2)

2.0

This Solution is incorrect 

Option 3)

7.0

This Solution is incorrect 

Option 4)

1.04

This Solution is incorrect 

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