Portage Learning Chem 210 Finals Mod 2 ACTUAL EXAM QUESTIONS WITH VERIFIED ANSWERS

Portage Learning Chem 210 Finals Mod 2 ACTUAL EXAM QUESTIONS WITH VERIFIED ANSWERS Scientific Calculator The pH of a solution of 8.9 x 10-12 M NaOH is: A. 8.9 B. 8.9 x 10-12 C. 4.8 D. 11 E. 2.9 A B C D E Question 1 3 / 3 pts lOMoAR cPSD| Question 2 3 / 3 pts Question 4 3 / 3 pts [Kw=[H+][OH-] = 1.0 x 10-14; [H+][8.9 x 10-12] = 1.0 x 10-14 ;[H+]=890; pH=-log[890]=2.9] Water is a unique molecule. Which of the following contributes to water’s unique place in the chemical world? The geometry of the molecule The polarity of the O-H bonds The ability of water molecules to hydrogen bond The bond angle of water All of the answers are correct ALL OF THE ANSWERS ARE CORRECT What factor contributes to the bent shape of a water molecule? The dipole arrows in a water molecule The unshared electron pairs on the oxygen atom The electronegativity difference between hydrogen and oxygen The unequal electron sharing between hydrogen and oxygen None of the answers are correct THE UNSHARED ELECTRON PAIRS ON THE OXYGEN ATOM Which diagrams correctly represent a hydrogen bond? lOMoAR cPSD| Page 2 of 22 lOMoAR cPSD| Question 5 3 / 3 pts A and B A and D B and C C and D A and C A AND C BOTH SHOW A PROTON DONOR AND ACCEPTOR