Question

# The Ksp for BaCO3 is 1.6 x 10-9 . A)Write a chemical equation for the equilibrium...

The Ksp for BaCO3 is 1.6 x 10-9 .

A)Write a chemical equation for the equilibrium of BaCO3 (s) with its ions.

B) When 20.0 mL of a 0.10 M Ba(NO3)2 is added to 50.0 mL of a 0.10 M Na2CO3 calculate the reaction quotient and determine if a precipitate will form?

C) For the same reaction, predict the direction the system once it gets to equilibrium will shift when acid is added to the system.

(a)

The chemical equation is:

BaCO3(s) ---> Ba2+(aq) + CO32-(aq)

(b)

The reaction quotient is:

Q = [Ba2+]*[CO32-] = [0.1/3.5]*[0.1/1.4] = 0.00204

Since Q > Ksp, so the precipitate will form.

(c)

When system is at equilibrium, and if acid is added, [H+] will increase, which means the weak acid H2CO3 will form by consuming the carbonate ions. This will cause the system to go towards left, so the ppt will dissolve and more of the Ba2+ and CO32- ions will get into the solution.

Hope this helps !

#### Earn Coins

Coins can be redeemed for fabulous gifts.