Post-Laboratory Questions (use the spaces provided for the answers and additiona
ID: 1049266 • Letter: P
Question
Post-Laboratory Questions (use the spaces provided for the answers and additional paper if necessary. 1. Define the solubility of a substance. 2. Convert your experimental solubility of KHT (n mol L 1) to g KHT per 100 mL Compare this solubility to the literature value, obtainable from a chemistry handbook. 3. Given the following solubility vs. temperature data for two compounds, answer the questions below Compound A temperature, C 25.0 26.7 30.8 41.7 48.0 63.0 560 t 581 t 623 t 646 t 671 27 solubility, mol L Compound B 25.0 38.6 43.4 49.0 520 562 60.0 67.2 temperature, C solubility, mol L 7.17 8.37 9.13 10.0 11.2 12.6 a) On graph paper, plot solubility vs. temperature for both compounds on one set of axes. 2) Which compound's solubility is more affected by changes in temperature? Explain. (3) For each compound, determine the percent error in calculated solubility if the determination was supposed to have been made at 25 C, but the stirring motor actually heated the solution to 35 C. 127Explanation / Answer
1. The maximum amount of a substance which can be dissolved in a given amount of solvent at constant temperature is called solublity of that substance.
Solublity depend on following factors:-
A) nature of solute and solvent
B) temperature
C) pressure