NaOH,Na2 S\mathrm{NaOH}, \mathrm{Na}_{2} \mathrm{~S}NaOH,Na2 S ও Na2CO3\mathrm{Na}_{2} \mathrm{CO}_{3}Na2CO3
NaHSO4,Na2CO3\mathrm{NaHSO}_{4}, \mathrm{Na}_{2} \mathrm{CO}_{3}NaHSO4,Na2CO3
K2SO4,Na2 S,NaOH\mathrm{K}_{2} \mathrm{SO}_{4}, \mathrm{Na}_{2} \mathrm{~S}, \mathrm{NaOH}K2SO4,Na2 S,NaOH
H2SO3,Na2CO3\mathrm{H}_{2} \mathrm{SO}_{3}, \mathrm{Na}_{2} \mathrm{CO}_{3}H2SO3,Na2CO3