Question

Balance this equation:
[?]Na²SO⁴(aq) + [?]CaCl²(aq) -> [?]CaSO⁴(s) + [?] NaCl(aq)

I don't understand chemistry at all :((((

Answer 1

Not surprising, since those should be subscripts, not superscripts. So, ignoring for the moment all the phase indications (yes, they are important, but just clutter things up while we're trying to balance the equation), we have

Na_₂SO_₄ + CaCl_₂ -> CaSO_₄ + NaCl

We need to make sure that the same number of atoms wind up on both sides of the equation. Right off, we see that we have 2 atoms of Na and Cl on the left, and only one on the right. So, a good place to start would be

Na_₂SO_₄ + CaCl_₂ -> CaSO_₄ + 2NaCl

Now we have 2 Na on each side. In fact, now we're done, since we now also have 2 Cl one each side. Since Na and Cl have a valence of 1, and Ca and SO4 have a valence of 2, now things match up.

Now you can tidy things up to indicate where the solutions and precipitates are.

Answer 2

i still have 0 understanding

Answer 3

friends you should consult:
google
youtube
your class text

If you have been given this problem, and you have zero understanding, you must not have been paying attention. Teachers really don't just pop in one day and say -- Here's a problem that we have never studied. Do it all on your own.