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did i do these net ionic equations right?

Frist i wrote out the equation then i put them in an ionic equation last i wrote them as a net equation.

a. Na2CrO4 (aq) + Ba(NO3)2 (aq) --> 2NaNO3 (aq) + BaCrO4 (s)

Na(aq) + CrO4 (aq) + Ba (aq) + NO3(aq) --> Na(aq) + NO3(aq) + BaCrO4 (s)

Ba2+(aq) + CrO42- (aq) --> BaCrO4 (s)

b. Na2CrO4 (aq) + BaCl2 (aq) --> 2NaCl (aq) + BaCrO4 (s)

Na(aq) + CrO4(aq) + Ba(aq) + Cl-(aq) --> Na(aq) + Cl(aq) + BaCrO4 (s)

Ba(aq) + CrO4(aq) --> BaCrO4 (s)

c. Na2SO4(aq) + Ba(NO3)2(aq) --> 2NaNO3 (aq) + BaSO4 (s)

Na(aq) + SO4(aq) + Ba(aq) + NO3(aq) --> Na(aq) + NO3(aq) + BaSO4 (s)

Ba(aq) + SO4(aq) --> BaSO4 (s)

d. Na2SO4 (aq) + BaCl2 (aq) --> 2NaCl (aq) + BaSO4 (s)

Na(aq) + SO4(aq) + Ba(aq) + Cl(aq) --> Na(aq) + Cl(aq) +BaSO4 (s)

Ba(aq) + SO4(aq) --> BaSO4 (s)

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By my notes that I have from my chemistry, you have gotten them all right. YOU HAVE DONE WELL