a.) HCl+H2O=H3O+Cl
b.) NaCl+H2O=NaOH+HCl
c.)NaOH+HCl=NaCl+H2O
d.)HCl+NaOH=NaCl+H2O
Reactants: to the left side of equation
Product: to the right side of equation
H2O is water
HCl is hydrochloric acid
NaCl is sodium chloride aka table salt
NaOH is sodium hydroxide