Question

Acid or base?

Answer 1

Bronsted-Lowry acid or base?
a) ClCH2COOH
b) NH3
c) ClO-
d) HCOO-
e) HN3
f) NO2-

Is it:
a) Acid (H at the end can go bye bye?)
b) Base
c) Base
d) Base
e) Acid
f) Base?

Answer 2

Or can D lose the H also?

Answer 3

(d) looks like this (viewing the wikipedia structure):
O
||
C
H / \ O-
I am thinking the Hydrogen here is too well off here to want to leave. It is more likely to want another Hydrogen proton to latch onto the extra electron on the oxygen, rather than get an excess of electrons on the carbon where the hydrogen was..

The others look good to me.

Answer 4

You are awesome.

Answer 5

Thanks. :p
This is also good coverage for me since I have some contests related to Chemistry coming up.

But I will still advise that you consider everything I said here with criticism because I am also learning about this in the process. I will continue to review the material but it only seemed most correct from what I know. ;[

Answer 6

What you have there is formic acid, the conjugate base is formate ion:

Answer 7

Thanks!