How do you balance mg oh 2 ADD hno3 -- mg no3 ADD h2o?

Answer 1

Mg(OH)2 + 2HNO3 -> Mg(NO3)2 + 2H2O

Like that.

Remember, NO3 is 1- and Mg is 2+, so you need 2 NO3 to fo with 1 Mg.

Answer 2

To balance the chemical equation Mg(OH)2 + HNO3 → Mg(NO3)2 + H2O, start by balancing the elements other than hydrogen and oxygen. Balance Mg first: Mg(OH)2 + 2HNO3 → Mg(NO3)2 + H2O. Then balance hydrogen by adding 2 molecules of water: Mg(OH)2 + 2HNO3 → Mg(NO3)2 + 2H2O. Finally, balance oxygen by adding 2 more nitric acid molecules: Mg(OH)2 + 2HNO3 → Mg(NO3)2 + 2H2O.