2022-2023 Chem328 Review HW For Polarity, IMF And Physical Properties Including Solutions, Molarity

1. Print out a copy of [Bond Polarity Worksheet] and fill in the appropriate information in each box for (can use piece of paper if dont have table)) a) Ca-Cl, b) C-O, c) S-C, d) H-Cl, e) K-O, f) O-H


2. Print out a copy of [Worksheet for Molecular Polarity] and complete the table for the following: a) CCl₄ b) PCl₅ c)CS₂ d) NF₃


4. Write the symbol for a polar bond, _____________ and write down how you have memorized the direction of the symbol

______________________________________________________________________________

5. What are the cut-offs of deltaEN for ionic bonds ______________,

polar bond ______________, non-polar bond _____________


6. List the species (e.g. ionic, metallic, polar, etc) from highest IMF to lowest IMF

____________________________________________


7. What are the two IMF names for polar molecules interacting with each other? _____________ and ________________

8) London Dispersions force (caused by uneven distribution of electrons for very short period of time, called Instantaneous dipole) exist for all species? Yes or No?


9) Can an ionic compound (i.e. a set of ions) be polar or non-polar? Explain why or why not.


10) Pyramidal geometry is symmetrical, True or False (Circle one).


11) Which one of the following has the highest IMF and why (explain in space below), H₂O or CH₃CH₂OH. If you had a mixture of both, which would boil first, why?



12) Crude oil is a mixtures of compounds. Two of these compounds are hexane (C₆H₁₄) and octane (C₈H₁₈). What is the physical process called that separates these two liquid (look up in Internet)? What property is this physical process based on? Both of these substance have _________________ IMF. Which one has the higher IMF and why? Which one boils first (i.e. lower Boiling point)?



13)In replace of completing Molarity calculations (we will use the following), if you have 1.0 mole of Ca₁Cl₂:
a)How many moles of chloride ion (Cl^1-) do you have ?
b)How many moles of calcium ions (Ca²⁺) do you have?
c) How many total ions (both cations and anions) do you have? Briefly explain why.


d) On the back of this paper or another sheet of paper, draw a picture/diagram of what a solution of the above calcium chloride solution looks like in a particle view fashion/manner. Hint:: 13a-c should help. Please also include correct orientation of water molecules as needed in the diagram.
Provide an explanation of what happened if the calcium chloride started out as a solid ionic compound (don't have to draw solid ionic cpd).
Note (for your written discussion):
i)Please use hydrated ions and/or hydrated molecules where needed
ii) Please use partially negative and partially positive "ends" of molecules where needed


14) Again, in replace of completing Molarity calculations:
a)If I have 1.0mole of C₁O₁ (Carbon monoxide), how mole of the base unit (use correct name) of this substance do you have? (Please show chemical formula/symbol(s) charge for the base unit.

b) On the back of this paper or another sheet of paper, draw a picture/diagram of what a solution of the carbon monoxide solution looks like in a particle view fashion/manner. Hint:: 14a should help. Please also include correct orientation of water molecules as needed in the diagram.
Provide an explanation of why this gas would be in the water solvent anyway.
Note (for your written discussion):
i)Please use hydrated ions and/or hydrated molecules where needed
ii) Please use partially negative and partially positive "ends" of molecules where needed



15) On the back of this page, explain what happens when you add vegetable oil (just use an oval instead of chemical formula in drawing) and water try to mix. Do a similar explanation as in Q13/14.


16a) What do you call a solution that you can add more solute to? Unsaturated, saturated or saturation solution with solute in top/bottom

16b) What do you call a solution that you have as much solute as possible? Unsaturated, saturated or saturation solution with solute in top/bottom

16c) If you have a saturated solution, what happens when you add more solute?

17a) If you increased temperature of a solution, what happens?

17b) How does it affect the solution in Q13?

17c) How does it affect the solution in Q14?