Which of the following is a BrØnsted-Lowry acid? O NH3 O PH, Ο ΝΗ O C Cl 4 O Cl 2

Which of the following conditions indicate an acidic solution? pH = 3.04 (H+| > 1.0 X IO’7 A/ pOH = 4.51 |OH-J = 3.21 X 10"12 M

Which is the stronger acid, NH4+ or HBrO?

The following is a table of some of the oxoacids of the halogens. Which acid in the table is the strongest? Which is the weakest? Explain how you arrived at your answers Chlorine Bromine Iodine HOCl HOBr HOI HOClO HOBrO HOIO HOClO2 HOBrO2 HOIO2

Compare the structures of HNO2 and H2CO3. Which would you expect to be the stronger acid? Explain your choice.

The elements sodium, aluminum, and chlorine are in the same period.. (a) Which has the greatest electronegativity?. (b) Which of the atoms is smallest?. (c) Write the Lewis structure for the simplest covalent compound that can form between aluminum and chlorine. (d) Will the oxide of each element be acidic, basic, or amphoteric?

Calculate the pKa value for each of the following acids. a. Nitrous acid (HNO2), Ka = 4.5 104 b. Carbonic acid (H2CO3), Ka = 4.3 107 c. Dihydrogen phosphate ion (H2PO4), Ka = 6.2 108 d. Sulfurous acid (H2SO3), Ka = 1.5 102

. Calculate the pH corresponding to each of the pOH values listed, and indicate whether each solution is acidic, basic, or neutral. a. pOH = 4.32 b. pOH = 8.90 c. pOH = 1.81 d. pOH = 13.1

Rank the compounds in each of the following groups in order of increasing acidity or basicity, as indicated, and explain the order you assign. (a) acidity: NaHSO3, NaHSeO3, NaHSO4. (b) basicity: BrO2-, ClO2-,IO2-. (c) acidity: HOCI, HOBr, HOI. (d) acidity: HOCl, HOClO, HOClO2, HOClO3. (e) basicity: NH2-, HS-, HTe-, PH2-. (f) basicity: BrO-, BrO2-, Bro3-, BrO4-

Which of the following is a BrØnsted-Lowry acid? O C Cl 4 O NH O PH, Ο ΝΗ5 O Br 2