Answer:
na2co3 is a stronger base
na2co3 puts more oh- ion into solution
Explanation:
Step 1: Calculate the pH of 0.1 M Na2CO3
Kb value for Na2CO3 = 2.1 * 10⁻⁴
Set up an ICE table
CO_{3}^{2-} + H_{2} O ------HCO_{3}^{-} + OH^{-} \\[/tex]
I 0.1 - - -
C -x +x +x
E (0.1-x) x x
Step 2: Calculate pH of 0.1M NaHCO3
NaHCO3 is amphiprotic i,e it acts as an acid and base
For amphiprotic systems:
Conclusion:
pH of 0.1 M Na2CO3 = 11.66
pH of 0.1 M NaHCO3 = 8.33
Higher the pH , more basic the solution. Hence, Na2CO3 is a stronger base than NaHCO3