Which of the following is a correctly balanced reaction equation?
-CaCl2+ NaOH -> NaCl2+ Ca(OH)
-CaCl2 + 2NaOH -> 2NaCl + Ca(OH)2
-CaCl2 + NaOH -> NaCI + Ca(OH)2
-2CaCl2 + 4NaOH -> 4NaCl + 2Ca(OH)2
I believe that it is either 2 or 4?
#2 is the CORRECTLY balanced equation.
#4 DOES HAVE EQUAL NUMBERS OF ATOMS ON EACH SIDE but the coefficients are just double what you see in #2. To be CORRECT you want the coefficients to be the smallest set of numbers; therefore, #4 is not CORRECTLY balanced although it is balanced.