Question

Urgent! Rezolvare completa, va rog frumos, care stie..

Answer 1

1). mHCl=?
mNaCl=100g
H2SO4
MNaCl=23+35,5=58,5
1 mol NaCl=58,5g
MHCl=1+35,5=36,5
1 mol HCl=36,5g
H2SO4+2NaCl=Na2SO4+2HCl
supliniezi si supraliniezi pe NaCl si HCl si sub NaCl pui 100 sus 58,5 si sub HCl pui x si sus 36,6 si scoti proportia
(2×58,5)÷100=36,5÷x
117÷100=36,5÷x
x=(100×36,5)÷117
x=3650÷117
x=31,19g HCl

2)nCa(OH)2=5 moli
MCa(OH)2=40+2×16+2×1=40+32+2=74
1 mol Ca(OH)2=74 g
5 moli Ca(OH)2=74×5=370g