Portage Learning CHEM 210 Module 2 Exam Questions With Answers Latest Updated (Graded A+)

Portage Learning CHEM 210 Module 2 Exam Questions With Answers Latest Updated (Graded A+) 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 Question 1 Portage Learning CHEM 210 Module 2 Exam Questions With Answers Latest Updated 2024- 2025 (Graded A+) ABC Question 2 D E [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] Which attribute contributes to water’s unusual properties? The geometry of the molecule The polarity of the O-H bonds Question 3 The ability of water molecules to hydrogen bond The bond angle of water All of the answers are correct Question 4 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 Which diagrams correctly represent a hydrogen bond? Question 5 A and D both show a proton donor and acceptor A and C B and C C and D B and D Scientific Calculator The H+ concentration of a solution is 1.2 x 10-3 M. What is the pH? -1.20 1.20 3.12 Question 6 -2.92 2.92 [ [H+]=1.2 x 10-3 pH=-log[1.2 x 10-3] = 2.92} Scientific Calculator If the Ka of an acid is 5.63 x 10-3, what is the pKa? 6.86 2.25 [pKa = -log(5.63 x 10-3) = 2.25]