calculate the pH of a 0.1 M solution of baking soda.
showing step by step.

Question

calculate the pH of a 0.1 M solution of baking soda.
showing step by step.

aaronq · Answer

Baking soda acts as a base at pH =7

so write an equation for the process and it's equilibrium expression.

Make an ICE table and plug the values from E into the eq. expression.

use $[OH^-]$ to find pH.

anonymous · Answer

how would i write the equation for the process and its equilibrium expression.

aaronq · Answer

$HCO_3^-+H_2O\rightleftharpoons OH^-+H_2CO_3$

$K=\dfrac{[products]}{[reactants]}=\dfrac{[OH^-][H_2CO_3]}{[HCO_3][H_2O]}$

but it reduces to: 

$K=\dfrac{[OH^-][H_2CO_3]}{[HCO_3]}$

anonymous · Answer

thank you so much that was lots of help.

aaronq · Answer

no problem, glad i could help

anonymous · Answer

:)