BaCO3...now I'm confused

[Cofo]

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I thought BaCO3 was insoluble, so according to the reaction below, why does it dissociate?

This problem asks
What is the Net Ionic Equation for:
BaCO3 + HCl ->

Answer:
BaCO3 + 2H+ -> H2O + CO2 + Ba

 

[PooyaH]

This is the main reaction:

BaCO3(s) + 2HCl(aq) -> BaCl2(aq) + CO2(g) + H2O(l)

BaCO3(s) + 2H+ + 2Cl- -> Ba2+ + 2 Cl- + CO2(g) + H2O(l).....cancel out 2Cl-

You end up with:

BaCO3(s) + 2H+ -> Ba2+ + CO2(g) + H2O(l)

 

[PooyaH]

BaCO3 is insoluble and it doesn't dissociate in solution, but when it reacts with HCl, you'd get BaCl2 (soluble, so dissociates) and CO2 (g) and H2O(l).

 

[skim1988]

how do you determine whether or not something's soluble??

 

[Golfguy]

how do you determine whether or not something's soluble??

You have to memorize the solubility rules.

 

[skim1988]

You have to memorize the solubility rules.

n

yea i did but i thought chad said that G1 metals, NH4+, ClO4-, NO3-, and C2H3O2- were soluble and that Ag, Pb, and Hg were insoluble. So why would BaCl2 be considered soluble?

plz help. my test is in couple hours

 

[Golfguy]

n

yea i did but i thought chad said that G1 metals, NH4+, ClO4-, NO3-, and C2H3O2- were soluble and that Ag, Pb, and Hg were insoluble. So why would BaCl2 be considered soluble?

plz help. my test is in couple hours

In that case, don't worry about this topscore exam question. Just remember what Chad taught you and you will be fine.