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

5 Answers

  • Dr W
    Lv 7
    1 decade ago
    Favorite Answer

    start with this

    __ 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.

  • 1 decade ago

    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.

  • 1 decade ago

    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!
  • 1 decade ago

    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.

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  • 1 decade ago

    Your question in wrong, it should be

    Ca(OH)2 + HNO3 => Ca(NO3)2 + H2O

    In this case just put a 2 before HNO3 to be 2HNO3, and another 2 before H2O, to become 2H20.

    you have 1 Ca on each side, 8O's on each side, 4H's on each side, and 2N's on each side.

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