, . , - , . ϳ , 3,31 (). () , 1,27 . , . (), .
:
m(Pb(NO3)2) = 3,31 = 3 310
m(Na2CO3) = 1,27 = 1 270
M (Pb(NO3)2) = 331
M(Na2CO3) = 106
M (PbCO3) = 267
n . -?
m (PbCO3) -?
г:
:
, () , :
n (Pb(NO3)2) =
n (Pb(NO3)2) =
n (Na2CO3) =
³ , 12,0 > 10,0 , , , :
n. = 12,0 10,0 = 2,0 .
, , ():
n (PbCO3) = n(Pb(NO3)2) = 10,0 ;
m (PbCO3) = n(PbCO3) M(PbCO3);
m (PbCO3) = 10 267
³: Na2CO3 2,0 , 2,67 .