What is the balanced chemical equation of Ca2 +H2O >C2H2 + Ca(OH)2?
I think you mean
This is the reaction between calcium carbide and water, which produces ethyne, (old name acetylene) which is highly flammable.
To balance the equation, firstly look at the carbon atoms. We have 2 in the
Now look at O atoms.There are 2 of them in
We can check that this is balanced using the H atoms. Four in the two water molecules on the left; two in the ethyne and two in the calcium hydroxide on the right, so they balance too as they should.