Ba(NO3)2 is added (BaCrO4 (s) is less soluble than BaCr2O7 (S))

provide an explanation

Thank You

4 answers

an explanation for what?
2 CrO4 + 2H = Cr2O7 + H2O
Determine the color the solution would turn when each of the following is done to the reaction at equilibrium. provide an explanation for each.
a0 HCl is added (orange)
b) NaOH is added (yellow)
c) Ba(NO3)2 is added (BaCrO4 (s) is less soluble than BaCr2O7 (S)) (yellow)

but I need help provide an explanation
for each.

Thank you
It's all about Le Chatelier's Principle.
Why BaCr207 is less precipitate than BaCrO4