Question

determinati concentratia molara a unei solutii de azotat de cobalt plecand de la 500 ml de solutie si 0,2 moli

Answer 1

MCo(NO3)2=59+2(14+3*16)=183g/mol

n=md/M==>md=n*M=0.2*183=36.6g CO(NO3)2


Cm=md/M*Vs(L)=36.6/183*0.5=0.4 moli/L

sau

Cm=n/Vs=0.2/0.5=0.4 moli/L