ile wody zawarte jest w 100 cm3 roztworu glukozy d=1,3 g/cm3 i stezeniu 2,5 mol/dm3

[latex]\ d=frac{m}{V}=>m=d*V=1.3frac{g}{cm^3}*1000cm^3=130g\ MC_6H_1_2O_6=180frac{g}{mol}\ 2.5mola - 1000cm^3\ x - 100cm^3\ x=frac{2.5mola*100cm^3}{1000cm^3}=0.25mola\ [/latex] [latex]\ 180g - 1mol\ y - 0.25mola\ y=frac{180g*0.25mola}{1mol}=45g\ m_r=m_s+mH_2O\ mH_20=m_r-m_s=130g-45g=85g[/latex]

ile wody zawarte jest w 100 cm3 roztworu glukozy d=1,3 g/cm3 i stezeniu 2,5 mol/dm3 Cmol=ms/[Ms*Vr] Cmol=2,5mol/dm^3 Vr=100cm^3=0,1dm^3 mr=Vr*d=100*1,3=130g Ms=M C6H12O6=6*16+1*12+12*6=180g/mol ms=? 2,5=x/180*0,1 x=2,5*18=45g mH2O=mr-ms=130-45=85g