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Chemistry Help needed. My lab manual is asking for a strange answer with precipitation reaction.?
"Write the balanced equation for the reaction of aqueous sodium carbonate and
aqueous calcium chloride dihydrate to form solid calcium carbonate and aqueous
sodium chloride. Include phase labels for each reactant and product. Don’t forget the
water."
I've checked everywhere, and I can't find anywhere else where water was a reagent or product in the reaction. Do they literally want me to add H2O in the reaction somewhere?!
2 Answers
- Trevor HLv 74 years ago
You are quite correct in what you say. I can only assume that because the question has aqueous calcium chloride dihydrate as a reactant , the equation should be written as:
Na2CO3(aq) + CaCl2.2H2O(aq) → CaCO3(s) + 2NaCl(aq) + 2H2O(l)
But this is not how this is usually written
What does the rest of the question include. There may be some question about the relationship between the mass of CaCO3 produced, and the mass of CaCl2.2H2O originally weighed out.
It is always a good idea to submit the complete original question - then you get maximum help.
