2g of NaOH is dissolved in 400 cm of water. 250 cm of 0,14 mol. dmº H2SO, is allowed to react with this NaOH solution to produce Na SO,.
The unbalanced chemical reaction equation is as follows:
NaOH + H2SO4
->
Na So. +
H2O (9)
1.1
Balance the above-given chemical equation.
1.2
Do the necessary calculations to determine the limiting reactant.
1.3
Calculate the percentage yield of Na, so, if 3g was produced.
1.4 How much steam was therefore produced?
(

2fe + 3h2so4 -> fe2(so4)3 + 3h2

it is necessary to balance equations in order to get the proper amount of reactants as well as products in order not to make a miscalculation.

you cannot change the subscripts as that would change the substance itself. for instance, diatomic elements such as h2 only have the subscript two when a gas. another example would be so4, if you were to change the subscript, the element would no longer be sulfate.

we change the coefficients instead as that only changes the number of molecules rather than the substance itself.

hope this !