Question

__ HF + __ NaOH → __ H2O + __ NaF

Answer 1

_HF + _NaOH $\longrightarrow$ _NaF + _H₂O

here, we have to balance the chemical equation in which we have to make equal number of atoms in reactant as well as in product to satisfy law of conservation of mass.

so , here number of H in reactant =2 , and number of H atom in product= 2

number of O atom in reactant = 1 and number of O atom in product is =1

number of Na atom in reactant is = 1 and number of Na atom in product is =1

and number of F atom in reactant is =1 and number of F atom in product is =1

so here all the atoms of reactant is equal to number of atoms of products

so here the balanced equation will be

$1HF + 1 NaOH \longrightarrow1NaF + 1H_2O$