Equilibrium - Result Question 90

####94. Which has the highest value of pH ?

[2002]

(a) CH3COOK

(b) Na2CO3

(c) NH4Cl

(d) NaNO3

Show Answer

Solution:

  1. (b) Na2CO3 is a salt of weak acid H2CO3 and strong base NaOH, therefore, its aqueous solution will be basic hence has pH more than 7 .

Na2CO3+2H2O⟶2NaOH strong base +2H2CO3 weak acid 

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