Răspuns:
Explicație:
a)-calculez masa de hidroxid pur, ce intra in reactie,stiind p=80%
p=m,px100/m,i-----> m,p= 80x230/100g=184g Ca(OH)2
b)-calculez masa de clorura de calciu ce rezulta din reactie,
stiind: M,Ca(OH)2= 74g/mol M,CaCl2 =111g/mol
1mol............2mol sau, in grame
Ca(OH)2 +2HCl------> CaCl2 + 2H2O
74g................................111g
184g...................................m=184x111/74g=............................calculeaza !!!!