II. Freezing point of a pure solid. Data Table. 1. mass of pure naphthaleneo nili13119 9.574g. anoli * 2. Freezing (melting ) point of naphthalene0.eCa 18.4°% III. Molecular weight by freezing point depression. SISU Data Table 1. mass of unknown * 2. Freezing (melting ) point of solution 72.3°0 Calculation (Carry out to proper number of significant digits.) 1. AT (difference in freezing points of pure naphthalene and solution) AT= oN awominU 2. molecular weight of unknown solute AT=Kfom KP Nmph= 7.0°G/ molal

II. Freezing point of a pure solid. Data Table. 1. mass of pure naphthaleneo nili13119 9.574g. anoli * 2. Freezing (melting ) point of naphthalene0.eCa 18.4°% III. Molecular weight by freezing point depression. SISU Data Table 1. mass of unknown * 2. Freezing (melting ) point of solution 72.3°0 Calculation (Carry out to proper number of significant digits.) 1. AT (difference in freezing points of pure naphthalene and solution) AT= oN awominU 2. molecular weight of unknown solute AT=Kfom KP Nmph= 7.0°G/ molal

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Name Time M T W R F The freezing point of pure benzene (CH,) is 5.50°C. The freezing point of a solution containing 5.00 g of an unknown non-dissociating solute in 444 g of benzene is 5.07°C. K, of benzene = 4.90°C/m. Show complete calculations for each question below. 1. What is the freezing point depression for this solution?
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1. The freezing point datas of pure water and 150 grams of H20 that includes 10 g of sucrose (C12H22011) are given below. According to these datas, calculate the molecular weight of 10 g sucrose (C12H22011) dissolved in 150 g of H2O. a. Freezing point of pure water, Tf = 0 °C Freezing point of solution, Tf = -0. 34 °C Freezing point depression, ATf = ... (0- (-0.34)) = 0.34°C Molal freezing point depression of water, Kf = •.1.86°C kg/mol b. Molality of solution, m = . c. Molecular weight of solute, MWs = .. %3D 2. Find the theoretical molecular weight of solute in literature and calculate the percentage error in molecular weight. MWs, real = Error%=
The formula for freezing point depression is AT = а. Кm O b. K/ws/mol O c. w/Ws m с. Od. MW/kw Previous page Type here to search DOLL
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