Portage Learning - CHEM 103 MODULE 5 Exam, Exams of Chemistry

Download Portage Learning - CHEM 103 MODULE 5 Exam and more Exams Chemistry in PDF only on Docsity!

Portage Learning - CHEM 103 MODULE 5 Exam

Question 1

10/ 10 pts

Question 2

10/ 10 pts

Show the determination of the charge on the ion formed by the P 15 atom. Your Answer: P 15 (nonmetal = gain electrons) 1s 2 2s 2 2p 6 3s 2 3p 3 gain 3 e → P- 3 H = 2.1 I = 2. Li = 1.0 Be = 1.5 B = 2.0 C = 2.5 N = 3.0 O= 3.5 F = 4. Na = 1.0 Mg = 1.2 Al = 1.5 Si = 1.8 P = 2.1 S = 2.5 Cl = 3.

Question 4

10/ 10 pts

Your Answer: (B) On a piece of scratch paper, draw the Lewis structure for the H 2 CO 3. Then choose the correct Lewis structure for H 2 CO 3 from the options listed below.

Question 5

10 / 10 pts

Question 6

10 / 10 pts

Your Answer: (A) Determine the electron geometry and explain your answer for the S atom in H 2 S. Your Answer: The S atom in H 2 S has 4 groups of electrons around it in its Lewis structure, therefore, its electron geometry would be tetrahedral. Determine the hybridization and explain your answer for the C atom in HCN. Your Answer: The C atom in HCN has 2 groups of electrons around it in its Lewis structure, therefore, its hybridization would be sp.

Question 9

10/ 10 pts

K = 0.8 Ca = 1.0 Ga = 1.6 Ge = 1.8 As = 2.0 Se = 2.4 Br = 2. Use the electronegativities above and your knowledge of the shape of HCN to determine the molecular polarity of HCN explaining your answer in detail. Your Answer: The shape is linear because carbon is the central atom of HCN and the hybridization of carbon is sp. Nitrogen has one pairing causing the polar covalent bond to form. The shape of HCN is linear and since it has only one polar bond (C≡N), the molecule would be polar. Is CH 4 Polar, Ionic or Nonpolar and List and Explain whether it is Soluble or Insoluble in Water? Your Answer: CH 4 has all nonpolar bonds which makes it Nonpolar and since it is Nonpolar it is Insoluble in water.

Question 10

10 / 10 pts

Arrange the following compounds in a vertical list from highest boiling point (top) to lowest boiling point (bottom) and explain your answer on the basis of whether the substance is Polar, Nonpolar, Ionic, Metallic or Hydrogen bonding: NaF, Br 2 , Mn, NH 3 , HCl Please note in this question you are not being asked to list BPs but the compounds in a list from highest to lowest BP on the basis of the type of compound. Your Answer: NaF (ionic) = Mn (metallic) NH 3 (Hydrogen Bonding) HCl (Polar) Br 2 (Nonpolar)