Na2CO3\mathrm{Na}_{2} \mathrm{CO}_{3}Na2CO3
NaCl\mathrm{NaCl}NaCl
H2SO4\mathrm{H}_{2} \mathrm{SO}_{4}H2SO4
Na2S2O3\mathrm{Na}_{2} \mathrm{S}_{2} \mathrm{O}_{3}Na2S2O3