Răspuns :
23
1 mol HCl-------------6,023 .10 molecule HCl
23
x moli--------------------12,046 .10 molecule HCl
x=2 moli HCl
1mol HCl--------36,5 g HCl MHCl=1 + 35,5=36,5---->1mol=36,5g
2moli HCl-------y
y=2.36,5=73 g HCl
zg 73g x1
Mg + 2HCl = Mg Cl2 + H2
24g 2.36,5g 95g
z=73. 24 :2.36,5=24gMg pur
puritatea=p= mp.100:mt
mt=mp.100:p
mt=24.100 :70=34,28 g Mg total
x1=73.95:2.36,5=95g MgCl2
Pentru HCl------> 73g reprezinta md pentru solutie
Se calc . ms
c=md.100 :ms
ms=md.100:c
ms=73.100: 30=243 g sol. HCl
V sol.------>ro=ms:Vs
Vs=ms: ro
Vs=243 ;1,15= 210 cm cubi HCl