Harjutustund 3 Õhu niiskus
Lahendus:
a) m(HCl)5% lahus = *V = 1,02g/cm3*30000cm3 = 30600g
m(HCl) = 30600g*0,05 =1530g
n(HCl) = m/M = 1530g/36,5g/mol = 41,9mol
V(HCl) = n*Vm = 41,9mol*22,4L/mol = 939L
b) n(HCl) = c*V = 0,4mol/L*80L = 32mol
V(HCl) = n*Vm = 32mol*22,4L/mol = 717L
6. Kui palju vett on vaja välja aurutada 300 liitrist 1,5%-lisest suhkru lahusest (=1,008g/cm3)
30%-lise lahuse (=1,25g/cm3) saamiseks?
Lahendus:
m(suhkru 1,5%-line lahus) = *V = =1,008g/cm3*300000cm3 = 302400g
4
m(suhkur) = 302400g*0,015 = 4536g
m(suhkru 30%-line lahus) = 4536g/0,3 = 15120g
m(H2O) = 302400g - 15120g = 287280g = 287kg = 287L
7. Mitu liitrit gaasilist HCl (n.t.) ja vett on vaja 8 dm3 2M vesilahuse (=1,06g/cm3)
valmistamiseks?
Lahendus:
n(HCl) = c*V = 2mol/L*8L = 16mol
V(HCl) = n*Vm = 16mol*22,4L/mol = 358L
m(HCl)2M lahus = *V = 1,06g/cm3*8000cm3 = 8480g
annaabi.ee 
