SCH3U Unit 1 Key Questions Lesson 4 28 marks 12 For each of the following

Sch3u unit 1 key questions lesson 4 28 marks 12 for

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SCH3U Unit 1 Key Questions: Lesson 4 (28 marks) 12. For each of the following molecules, draw and name the VSEPR shape and indicate whether the molecule is polar or non-polar. (16 marks: 4 marks each) a) NF 3 b) CCl 4 c) SI 2 d) CS 2 13. Examine the following table and identify which of the substances A to F are ionic, which are polar covalent, and which are non-polar covalent. Give a reason for your choice in each case. (12 marks: 2 marks each) Substance Melting Point (°C) Solubility in water
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A –178 insoluble B –101 soluble C 730 soluble D –25 insoluble E –94 soluble F 651 soluble - A: Non-polar covalent, because it has a low melting point and is insoluble. - B: Polar covalent, because it has a low melting point but is soluble. - C: Ionic, because it has a high melting point and soluble. - D: Non-polar covalent, because it has a low melting point and is insoluble. - E: Polar covalent, because it has a low melting point but is soluble. - F: Ionic, because it has a high melting point and soluble.
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