Help with equation?

2018-03-08 1:31 pm

Molecular equation:
Cr2(SO4)3 (aq) + 3(NH4)2CO3 (aq) ---> Cr2(CO3)3 (s) + 3(NH4)2SO4
Complete ionic equation:
2Cr+3 (aq) + 3SO4-2 + 6NH4+ + 3CO3-2 ---> Cr2(CO3)3 (s) + 6NH4+ + 3SO4-2 (aq)
Net ionic equation:
2Cr+3 (aq) + 3CO3-2 (aq) ---> Cr2(CO3)3 (s)

更新1:

right or wrong?

更新2:

Provide the molecular, complete ionic, and net ionic equation for Fe(NO3)2 + KOH

回答 (2)

胡雪8°

2018-03-08 2:15 pm

✔ 最佳答案

Overall speaking, the equations are correct, but some state symbols have been missed. Usually, there is no space between the formula of reactant/product and the open bracket of the state symbol.

Molecular equation:
Cr₂(SO₄)₃(aq) + 3(NH₄)₂CO₃(aq) → Cr₂(CO₃)₃(s) + 3(NH₄)₂SO₄(aq)

Complete ionic equation:
2Cr⁺³(aq) + 3SO₄⁻²(aq) + 6NH₄⁺(aq) + 3CO₃⁻²(aq) → Cr₂(CO₃)₃(s) + 6NH₄⁺(aq) + 3SO₄⁻²(aq)

Net ionic equation:
2Cr⁺³(aq) + 3CO₃⁻²(aq) → Cr₂(CO₃)₃(s)

To indicate the charge, I rather put the number before the "+" or "-" sign. For example, "2+" usually means "2 positive charges", but "+2" means "a positive number +2". However, this is not a "must".

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david

2018-03-08 1:42 pm

all are correct

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