Rastvori

banejeca943's picture

0.678g 98.6% NaOH trosi se za potpunu neutralizaciju 18.4cm^3 rastvora H2SO4. Kolika je koncentracija rastvora H2SO4?

milicaradenkovic's picture

2NaOH+H2SO4------------------>Na2SO4+2H2O

ms=w*mr=0.678*0.986=0.668 g

n(NaOH)=ms/Mr=0.668/40=0.0167 mol

n(H2SO4)=n(NaOH)/2=0.0167/2=0.00835 mol

c(H2SO4)=n(H2SO4)/V(H2SO4)

c(H2SO4)=0.00835/0.0184=0.454 mol/l

banejeca943's picture

Hvala. :)