Homework Help: Chemistry

Posted by Sara on Wednesday, February 16, 2011 at 12:18am.

I wrote the dissociation or ionization in water for each of the following acids. I just want someone to check if they are right.

a) HC3H5O2(aq)<===> H^+(aq)+ C3H5O2^-(aq)

b) (CH3)2NH2^+(aq)<===> H^+(aq)+ (CH3)2NH(aq)

c) CH3COOH(aq)<===> H^+(aq)+ CH2COOH^-(aq)

d) H2PO4^-(aq)<===> H^+(aq)+ HPO4^2-

e) [Mn(H2O)6]^2+ <===> I don't know what to do with this one

Thanks

Chemistry - Sara, Wednesday, February 16, 2011 at 12:50am
e) [Mn(H2O)6]^2+(aq)<===> H^+(aq)+ [Mn(H2O)5]5OH^+(aq)
Chemistry - Dr Russ, Wednesday, February 16, 2011 at 10:00am
a) HC3H5O2(aq)<===> H^+(aq)+ C3H5O2^-(aq)

This is an odd way to write the this

a) C3H5O2H(aq)<===> H^+(aq)+ C3H5O2^-(aq)

Your answer to a) means you have shown the wrong proton dissociating here.

c) CH3COOH(aq)<===> H^+(aq)+ CH2COOH^-(aq)

should be

c) CH3COOH(aq)<===> H^+(aq)+ CH3COO^-(aq)

[It is possible to remove the proton that you have shown but not in water]

I am not clear what they are after for e) either.

They may be simple be looking for

e) [Mn(H2O)6]^2+H2O<===> H^+(aq)+ [Mn(H2O)6]OH^+(aq)
Chemistry - Sara, Wednesday, February 16, 2011 at 11:10am
Thanks, that helped a lot

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