Water is polar solvent. Sucrose is dissolved in water. Therefore sucrose must be
ID: 696761 • Letter: W
Question
Water is polar solvent. Sucrose is dissolved in water. Therefore sucrose must be a. polar b. nonpolar c. strong electrolyte d. none of these The solubility of salt (NaCl) in water increases with the 1. 2· of temperature and the solubility of oxygen gas in water increases with the of temperature. a. increase, increase b. increase, decrease c. decrease, increase d. decrease, decrease 3. Classify each of the following substances as a strong electrolyte, weak electrolyte, or nonelectrolyte. I. NaCI I. CH3OH(methanol) III. HC2H,O2(acetic acid) IV. NH H2O (or NH OH) V. H2SO4 a. I& III-strong electrolyte; II & IV -weak electrolyte V-nonelectrolyte b. I, Ill & V- strong electrolyte; IV-weak electrolyte; c. I&V-strong; electrolyte; IlI - weak electrolyte d. I-strong electrolyte e. I&V-strong; electrolyte; IlI & IV-weak electrolyte II-nonelectrolyte II - nonelectrolyte II & IV- nonelectrolyte II & IV- nonelectrolyte Ill & V-weak electrolyte; 4. Which of the following compounds is insoluble in water? S. Which of the following compounds is insoluble in water? a. NiSO4 b. BaCl2 c. Pb(NOs)2 d. Zn(CH COO)2 e. AgC 6. What is the percent by mass of NaCl if 12.5 g of NaCl is dissolved in 100. g of water? 12.5% b. 11.1% c. 15.0% d, 25.0% e. 33.1%Explanation / Answer
Ans 1 : a) Polar
As a general rule , "Like dissolves Like ". Since water is a polar solvent , it easily dissolves polar solute into it. The water molecules attract the polar areas on the sucrose molecule , and make it soluble in itself.
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