Check Your Understanding Ch. 12 Survey Mozilla Firefox Lub Lecture 6 (an 26) Cha

Question

Check Your Understanding Ch. 12 Survey Mozilla Firefox Lub Lecture 6 (an 26) Chapt... X Check Your Understand X Survey Monkey Inc (US urvey monkey com/ YRwYPGB soe e Q. Search Most visited o UoIT 3 Tinct 3 Blackboard t MyCa New Tab d Library ITsc mp 1. Which of the following is not generally true when dissolving a solute in a solvent? he entropy The enthalpy O The solute solvent interactions release energy o he solvent-solvent interacti require eneroy 2. Which of the following would you expect to be the most soluble in hexane (C6H14)? O Ethanol (CH3CH2OH O Table salt (NaCl) None of the above 3. Which of the following is a true statement regarding the effect of temperature on solubility? bility of most solids ased temperat ubility of most g ased temperat ty, there is not apparent trend Click to add notes 846 PM 4/16/2017

Explanation / Answer

(1) The statement that are not generally true are

   ---- The solvent -solvent interactions require energy

During this solute - solvent we are not consider the solvent - solvent interactions

(2) Hexane is a non-polar solvent. We know that non-polar scompounds dissolves in non-polar solvents

So among the given , ethanol-polar compound

   NaCl - ionic compound

   propane - non-polar

So propane is most soluble in hexane

(3) On increaing the temperature the kinetic energy of the solute molecules increases in solvent ocean there by more solute molecules interact with solvent molecules thereby solvalysis occur.

Therefore first statement is correct

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