How do you balance Co(OH)3 + HNO3-->Co(NO3)3+ H2O?

3 Answers
Oct 26, 2015

Co(OH)3(s)+3HNO3(aq)Co(NO)3(aq)+3H2O(l)

Explanation:

This is effectively an acid base reaction of the sort:

KOH(aq)+HNO3(aq)KNO3(aq)+H2O(l),

or more simply,

OH+H+H2O

How did I balance it? Well I know that for every species (every atom) on the LHS must correspond to a species on the RHS. And not only must the atoms balance, the electrical charge must balance. Given the 3 equations, are these conditions fulfilled here?

Oct 27, 2015

Co(OH)3+3HNO3Co(NO3)3+3H2O

Oct 30, 2015

Co(OH)3+3HNO3+Co(NO3)3+3H2O

Explanation:

1 Cobalt on either side so that is fine.
1 Nitrate on the left, 3 on the right so 3HNO3 on the left.
3 Oxygen on the left (not including the nitrate) , 1 on the right so 3H2O on the left
Check hydrogen: 6 on the left and 6 on the right so it's all fine.

Tip: make sure you check that there are an equal number of each element on either side