Question

80 de grame de soda caustica(hidroxid de sodiu) se neautrulizeaza cu acid sulfuric. Determinati:
a)masa de sare rezultata;
b)numaru de moli de acid comsumat

Answer 1

MNaOH=ANa+AO+AH=23+16+1=40g/mol

MHCl=AH+ACl=1+35,5=36,5g/mol

MNaCl=ANa+ACl=23+35,5=58,5g/mol

n=m/M=80/40=2 moli NaOH

NaOH + HCl = NaCl + H2O

a) 1mol NaOH........................58,5g NaCl
2 moli NaOH...........................x=Calculeaza !

b) 1mol NaOH..............1mol HCl
2 moli NaOH................2moli HCl