ok so im freaking out because im supposed to do a lab that i was away for. and i was supposed to copy the answers off somebody else in my class, but their answers were wrong, now im freaking out even more because its supposed to be like the only thing that goes on my midterm! someone pleaseeee help me... the chemical formula i had was CaCl2=NaCO3=CaCO3+NaCl, but this is impossible to balance. the only information i got was that calcium chloride and sodium were miixed together to create and turned a milky white colour, after a percipitate was formed in the liquid... someone please help me find the correct equation. PLEASE! thank you
2007-03-22 13:22:20 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
Na2CO3 is correct. All species but the CaCO3 are soluable in water so the reaction goes to the right with the calcium carbonate coming out as a fine precipitate.
2007-03-22 15:10:12 · answer #1 · answered by Brian T 6 · 0⤊ 0⤋
Are you sure you have the right equation? The formula for sodium carbonate is Na2CO3, not NaCO3 (sodium has a +1 charge and carbonate has a -2). In that case, the balanced equation is:
CaCl2 + Na2CO3 -> CaCO3 + 2NaCl
Sodium chloride is always soluble. Any compound beginning with Na is soluble. Most carbonates are insoluble, which accounts for the precipitate.
CaCl2(aq) + Na2CO3(aq) -> CaCO3(s) + 2NaCl(s)
I hoped that helped.
2007-03-22 20:49:55 · answer #2 · answered by L T 2 · 0⤊ 0⤋
sorry I dk! I just posted a science question and nobody answered! Isn't it a shame? Nobody knows chemistry! tsk tsk.. well sry i couldn't help ya out... but maybe u can help me?!?
2007-03-22 20:46:30 · answer #3 · answered by Trisha 4 · 0⤊ 0⤋