Question

omplete A 1.213 g sample contains only vitamin C(CH.0) and sucralose (C,,,,C1,0). When the sample is dissolved in water to a total volume of 25.7 ml, the osmotic pressure of the solution is 5.18 atm at 299 K. What is the mass percent of vitamin C and sucralose in the sample? omplete

Answer 1

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Let mass of vitamin c = agm mess of sucralose = (1213-1) molar mass of Virca 176gr/mole molar mass of sucralost: 397.59 Volume of solution a 25.7 ml 20.0257 L Total presure a 5.13 aton T= 299k R=0.032.1 L-amkt mot! [vitc] = a gm 0.221 IXM lacgm 0.02571 (sucralose] [l-213-2).gm . - P(1.213-X)*0.0978 M 397.5 yon me* 0.02571 from P = CRT vite = 0.2211 xXD0321 L-am x 299kx mol x mol = 5.428xatm K-mol Psucralose * {1-213--) *0.0978 moi 20.08212-4mm x 2996 = (1-213-7). 2.401 2.9124 - 2.40134 K-mol Total pressure ³ 5.428x + 2.9124 - 2.4012 5:18 am $ 2.9124 + 3.0272 2.26 76 = 3.0272 OY = 0.749 % on = 161-75% / amount of vitamio C = 0.749 m % OF Yit C = 0-749 .213 amount of sucralose ? />213-0.749 = 0.464 % of sucralose 0.464 vie 1.2.13 do 238252. cralose 3 0.464 X100 = 38-25%