Topscore GChem Question 47!

[GoBlue24]

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This question REALLY stumped me. The question is attached! Can anyone help me with this, please?

The correct answer is E) None of These

I was wondering, how come BaF2 (s) is insoluble? I had no clue that BaF2 would be insoluble, based off of Chad's videos/rules, destroyer, and datqvault... but apparently it is....

Also how is Reaction 2 a gas-forming reaction? I also had no clue that this would happen, based off of my understanding from Chad's videos, destroyer, and datqvault. The answer says that the products that will be formed from BaCO3 and HCl are H2O + CO2 + BaCl2. It seems kind of similar to a combustion reaction but wtfuzz...

 

[diene]

If you have H2CO3 forming it = H2O + CO2
Same with if H2SO4 was formed you get H2O and CO2

This is something you have to remember. Chad did not mention it in the DAT videos, but watch his double replacement video in the general chemistry section because it explains it well. He has made that video available for free (I am guessing because he forgot to talk about it in the DAT lectures).

Also, check this out http://www.csudh.edu/oliver/chemdata/solrules.htm
Flourides are usually insoluble, while other halides are soluble unless combined with the exceptions. Chad covered the most basic rules, so I am hoping those are all enough for the scope of the DAT. Memorizing this chart would be crazy...

Hope this helps!