Răspuns:
Explicație:
-se afla md sol. de HCl
md= c.ms :100
md=10 . 146 : 100=14,6 g HCl
xg 14,6g yg zg
NaOH + HCl = NaCl + H2O
40g 36,5g 58,5g 18g
x=40.14,6 :36,5=16g NaOH
n=m:M
n=16g : 40g/moli=0,4 moli NaOH
y=14,6 .58,5 : 36,5=23,4 g NaCl
n=23,4g : 58,5g/moli=o,4 moli NaCl
z=14,6 .18 : 36,5=7,2g H2O
n=7,2g : 18g/moli=0,4 moli H2O