ZnS + HCl ======> ?
Na2CO3 + HCl ======>?
ZnS is Zinc Sulfide and Na2CO3 is sodium carbonate and HCl is hydrochloric acid...and i need these balanced and completed.
2007-11-28 06:48:38 · 4 answers · asked by naknoi 5 in Science & Mathematics ➔ Chemistry
bored
2007-11-28 06:50:56 · answer #1 · answered by Anonymous · 0⤊ 0⤋
These are double replacement equations which means that all you have to do is switch the pairs. For example HCl + BaCO3 switches to H2CO3 +BaCl2. Ba has a plus two charge, but H only has a plus one charge so when you replace Ba with H, you need 2 H instead of just one. It is the same way with the Cl pairing with the Ba. CO3 has a minus two charge while Cl has a minus one. When you switch them, you have to have two Cl to equal the charge of one Ba. To balance the equation, look at how many of each element you have. Put coefficients in front to make every element have the same on both sides. Using this model, you should be able to complete the rest of the equations in the same way. Good luck!
2016-05-26 05:48:29 · answer #2 · answered by ? 3 · 0⤊ 0⤋
ZnS + 2HCl -> ZnCl2 + H2S
Na2CO3 + 2HCl -> 2NaCl + H2CO3 -> 2NaCl + CO2 + H2O
Both reactions evolve gas. The first is hydrogen sulfide and the second is carbon dioxide.
2007-11-28 06:55:25 · answer #3 · answered by Roger S 7 · 0⤊ 0⤋
ZnS(s) + 2HCl(aq) = ZnCl2(aq) + H2S(g)
Na2CO3(aq) + 2HCl(aq) = 2NaCl(aq) + CO2(g) + H2O(l)
2007-11-28 07:00:04 · answer #4 · answered by lenpol7 7 · 0⤊ 0⤋