Răspuns:
Explicație:
sol. NaCl ,c=0,9%
gNaOH
g HCl
xg yg 150g
NaOH + HCl = NaCl+ H2O
40g 36,5g 58,5g
x= 150 .40 : 58,5= 102,56 g NaOH
y= 150 . 36,5 : 58,5=93,58 g HCl
ms NaCl= md.100 : c
ms= 150 . 100 : 0,9= 16666,6 g sol. NaCl
M NaOH= 23 + 16 + 1=40----> 40g/moli
M HCl= 1 + 35,5= 36,5----> 36,5g/moli
MBaCl= 23 + 35,5=58,5----> 58,5g/moli