Question

Calculati concentratia molara a solutiei care contine 3,65g HCL in 200ml solutie .(mase atomice H-1;CL-35,5)

Answer 1

C=n/V
n=m/M
M(HCl)=1*1+1*35,5=36,5g/mol
n(HCl)=3,65g/36,5(g/mol)=0,1mol
C=0,1mol/0,2l=0,5(l/mol)=0,5M
volumul se ia in litri