I did these three questions.
Could you please check that these are correct or not?

a. Ba^2+(aq) + Na2CO3(aq) --------> BaCO3(s) + 2Na^+
Ba^2+ + CO3^2- -------------------> BaCO3(s)

b. CaCO3(s) + HC2H3O2(aq) --------> Ca(C2H3O2)2 + H2O
CaCO3(s) + 2H^+(aq) ---------------> Ca^2+ + CO2 + H2O

c. CaC2O4(s) + HCl(aq) --------------> CaCl2 + H2C2O4
CaC2O4(s) + 2H^+(aq) --------------> Ca^2+(aq) + H2C2O4


I did like this.. could you please check these for me?
Thank you

They're all good! Well done! :)