Question

(continued) Section PL Da e identify Unknowns A and B as urea or glucose, and record your answers in Table 14.3. TABLE 14.3 Laboratory Data for Determining Molality and Solute Molar Mass for Each Solution Freezing Point Depression Constant for H2O: Freezing Point Test Tube Solute Depression (°C) Solute Molality (m) Solute Molar Mass (g/mol) 2 NaCl .. -2,23 293 0.60025 Unknown A 206297814139 Unknown B 2:14574 1.1536 89.5 42.2 51.3 4 Unknown B Based on my results, I conclude the following: Unknown A is U vea Unknown B is

did i do number 3 part c correct

Answer 1

% Error = 1 Theortical / Calculated - Experimental I x 100 Theortical I Calecelltid For Nach DTi calculated = alt expected = 3.72 Af experimental = 2.23293. alo Error = 3.72 - 2.23293 Ixioo 1.487 X 100 3.72 3.72 = 39.9751. yo'/. 11t exp = 2.62978. Uvca ats caleu = 1.81 % Error = 11.81 - 2062978 (x100 -0.8197811 x100 1.81 1.81 . S 1-3+1 = x 2 = 0.819781 X 100 - 45.29.12. ) 1001 - . 4 1.81 - For glucose also you calculate percent error correctly.