# Can someone balance this equation? Ca(OH)2 + HNO3 + Ca(NO3)2 + H2O? Please explain. thanks so much.?

Relevance

__ Ca(OH)2 +__ HNO3 → __ Ca(NO3)2 +__ H2O

next pick an atom that occurs in one molecule on the left and one on the right. 1 pick Ca....

put a 1 in front of the molecule containing Ca on the left.

1 Ca(OH)2 +__ HNO3 → __ Ca(NO3)2 +__ H2O

now you have 1 Ca on the left. next make 1 Ca on the right

1 Ca(OH)2 +__ HNO3 → 1 Ca(NO3)2 +__ H2O

next balance NO3.... you have 2 on the right ( because 1 x Ca(NO3)2 = 1 Ca + 2 x NO3). so make 2 NO3 on the left..

1 Ca(OH)2 + 2 HNO3 → 1 Ca(NO3)2 +__ H2O

now your left with 2 OH and 2 H on the left = 4 H + 2 O. next make the H's and O's on the right balance. 2 x H2O = 4 H and 2 O right? so....

1 Ca(OH)2 + 2 HNO3 → 1 Ca(NO3)2 + 2 H2O

and you're done.

• This is a standard acid/base reaction where an acid (HNO3)reacts withe a base Ca(OH)2 to produce a salt (Ca(NO3)2 and water H2O

Ca(OH)2 + 2HNO3 → Ca(NO3)2 + 2H2O

Note that in the equation you must have a → sign. You cannot have a line of + signs.

• You wrote it incorrectly... it should be this:

Ca(OH)2 + HNO3 = Ca(NO3)2 + H20

This is all about mass balance... whatever is on the left must be on the right because you can neither create nor destroy matter.

You can see that there are two N on the right side, therefore you need two on the left, which makes this:

Ca(OH)2 + 2HNO3 = Ca(NO3)2 + H20

but your O is out of balance now. There's 8 on the left side and 7 on the right. To correct is this:

Ca(OH)2 + 2HNO3 = Ca(NO3)2 + 2H20

Then just check each element for balance... all balances!

Source(s): Me, I'm a chemist!
• Ca(OH)2 + 2HNO3 + Ca(NO3)2 + H2O

Understanding how to balance this equation involves knowing what ions are being formed:

Ca(OH)2 -> Ca(+2) + 2OH(-)

HNO3 -> H(+) + NO3(-)

The next clue is that this is an acid/base reaction. HNO3 is a strong acid and Ca(OH)2 is a base. In these reactions, the product is water and salt. The salt being formed is Calcium nitrate, but it will require two molecules of HNO3 to form the salt:

Ca(+2) + 2NO3(-) -> Ca(NO3)2

In the process, 2 molecules of water are formed.