Sulfuric acid, H2SO4, can be neutralized by sodium hydroxide, NaOH. The unbalanced equation is: H2SO4(aq) + NaOH(aq) → Na2SO4(aq) + H2O(l) A student who was asked to balance the reaction wrote the following: H2SO4(aq) + Na2OH(aq) →Na2SO4(aq) + H3O(l) Is this correct? Explain why or why not using what you know about the law of conservation of mass and chemical changes. If necessary, provide the correct balanced equation.

Explanation:

Hello,

In this case, for the given chemical reaction:

We can notice that two sodium atoms and two hydrogen atoms are at the products but at the reactants there three and and respectively, thus, the solution given by the student is wrong since Na₂OH does not exist due to the fact that the charge of OH is -1 so there is going to be one sodium atom always in the sodium hydroxide. Besides, it is not possible to write H₃O since it correspond to hydroxonium ions (H₃O⁺) but not to water.

In such a way, by applying the law of conservation of mass which states that matter is neither created nor destroyed, we balance the chemical reaction as follows:

Whereas the addition of those twos allow us to have two sodium atoms and four hydrogen atoms at both reactants and products.

Best regards.

atomic mass = 39

number of neutrons = 20

number of protons= 19

electronic configuration = 1s2 2s2 2p6 3s2 3p6 4s1

the number of electron in first shell = 2

number of electrons in n=3 shell = 8