Precipitation Reactions - Using the Solubility Rules 

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In response to you your name: i did

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Molly Koch Its a chemical reaction called Double Displacement.

Ryan Ramlogan I think its not right to say that they dont have reaction. They have reaction but not precipitation reaction because you do not produce a solid precipitate.

+LZLZLZ ZEE it's because you want it to be in its simplest form. you can reduce Na2Cl2 to NaCl if you divide both by 2. it's in empirical form. I'm guessing you want the compounds in that form when you do this stuff. N2Cl2 is in molecular form.

+Icecube88 yeah, make sure you balance the compounds when you put the elements together. if they can be reduced, then you reduce. Pb(C2H3O2)2 + Na2SO4 for example. You pair up Pb and SO4. They are balanced, so move on. You pair Na2 and (C2H3O2)2. Acetate (C2H3O2) has a charge of 1-, and there are two of them. Na has a charge of 1+, and there are two of them, so they are balanced. Since they can be simplified though, you simplify them. You can divide both by 2, and that will give you Na(C2H3O2). That's the compound that you will use. So the whole thing together is PbSO4 + Na(C2H3O2). Then you go from there (if they are soluble or not and so on. Well I want to add that when you do go on from there, you will find that it is a precipitation reaction.

also, you can't reduce polyatomic ions. only if they are in parenthesis (indicating that there are more than one) can you reduce a polyatomic ion..if you get something like Na2SO4 paired up together, then you keep it like that. that's sodium sulfate. sulfate is SO4 with a 2- charge and sodium is Na with a 2+ charge. If you get Na4(SO4)2, then you can reduce it to Na2SO4. notice that the polyatomic ion hasn't changed, so you're good.

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Then both are precipitates

@@rixon3984 I love how you answered despite being 5 yrs late lmao

If you're in AP chemistry you have to (I only know about AP because i'm taking it right now)

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Dylan Johnson There's no need to balance the equation for that case because we are just trying to figure out if those reactants would produce a solid precipitate or not. We need to balance equation if we are solving stoichiometry problems..

Toshiko Satoru On the reactants side, Ag and Cl are seperate, when they combine on the product side the solid is formed because compounds containing Cl Br and I are soluble except when they are combined with Ag, Hg or Pb.

Serena Mallavarapu So Silver alone is Soluble?

Yeah, silver alone is soluble. It's not in a compound on the reactants side.

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