Question

Molaritatea solutiei care contine 4,9 g H2SO4 in 200mL solutie este:
a)0.33 b)0.25 c) 0.5 d) 1.33

Answer 1

mH2SO4=4,9 g
VH2SO4=200 ml=0,2 l
Cm=?
Cm=md/M*V
MH2SO4=2*1+32+4*16=98
Cm=4,9g/98g/mol*0,2L=0,25 mol/l