G-Chem Questions...

[dudewhensmydat]

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1) Do you know of any good way (mnemonic, maybe) of memorizing the solubility rules on pg. 914 of the Kaplan Book (Chapter 9)?

2) How do you calculate the oxidation of a central atom?

For example: NaClO4 (the answer is 7+), but I dunno how to do it.
NaClO (the answer is 1+)

It means a lot to me if you help. Thanks.

 

[Manyak222]

LOL
1) No, but really wishing someone does

2) Calculate each atom first. Na is +1, O is -2. 4 O's will give u minus 8, and the atom is neutral. so minus eight and plus one is minus 7. to make the molecule neutral, the middle atom must be positive 7.

 

[dudewhensmydat]

LOL
1) No, but really wishing someone does

2) Calculate each atom first. Na is +1, O is -2. 4 O's will give u minus 8, and the atom is neutral. so minus eight and plus one is minus 7. to make the molecule neutral, the middle atom must be positive 7.

Thanks Manyak! That's pretty sweet! It applies to the groups, I'm assuming, right? (since they have the same valence characteristics). For example, all the halogens have an oxidation state of -1, etc.

 

[Manyak222]

Check out the big brain on dude! you a smart *(^&%^%. Thats right. The metric system.

Pulp fiction

PS you're right incase you didnt get it 😉

 

[dudewhensmydat]

I simplified the rules on pg. 914 of G-Chem Ch.9 - these 3 rules may be easier to memorize than the 7 listed in the Kaplan book...

1) All silver, lead, and mercury salts = insoluble in aq. solns.
2) Nitrates, acetates, and perchlorates = soluble in aq. solns.
3) All group I and ammonium salts = soluble in aq. solns.