Write out the balanced equation for the reaction that occurs when ca(oh)2 and h3po4 react together. you do not need to make your subscripts smaller; just write them out at regular numbers. for example: ca(oh)2.

Explanation:

A balanced equation is the one which has equal number of both reactants and products.

The reaction between Ca(OH)2 and H3PO4 is as follows.

        Ca(OH)2 + H3PO4 Ca3(PO4)2 + H2O

Number of reactant atoms are as follows.

Number of product atoms are as follows.

To balance the equation, multiply Ca(OH)2 by 3 and H3PO4 by 2 on the reactant side. Also, multiply H2O by 6 on the product side.

Therefore, the balanced chemical equation will be as follows.

      3Ca(OH)2 + 2H3PO4 Ca3(PO4)2 + 6H2O

"standard molar enthalpy:

h2o ( liquid water ) : - 285.8 kj/mole

h2o ( water vapor ) : - 241.8 kj / mole.

δhrxn = - 241. 8 - ( - 285.8 )= -241.8 + 285.8 = 44.0

answer: 44.0 kj"