Equilibrium - Result Question 57

####59. What is the H+ion concentration of a solution prepared by dissolving 4g of NaOH (Atomic weight of Na=23amu ) in 1000mL ?

(a) 1010M

(b) 104M

(c) 101M

(d) 1013M

[1999]

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Solution:

  1. (d) No. of moles of NaOH=440=0.1

[Molecular weight of NaOH=40 ]

No. of moles of OH=0.1

Concentration of OH=0.11 litre =0.1mol/L

As we know that, [H+][OH]=1014

[H+]=1013([OH]=101)



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