Bell Work 1 / Determining pH of Acid and Base 1. Name the following compounds as acids. a. HNO3 b. H2SO3 c. HI 2. Determine the pH of the following: a. 1.9 X 10-4 M HCl b. 4.2 X 10-8 M Mg(OH)2 3. How many grams of calcium hydroxide would you need to make 500mL of 0.25 M Ca(OH)2 solution?

Bell Work 2 / Standardization of a Base 1. What is the Molar Mass of HC2H3O2. Is this a monoprotic, diprotic, or triprotic acid. 2. How many moles of HC2H3O2 are there is 0.612 grams. 3. If you titrate 0.612 g HC2H3O2 with 37.23 mL of Mg(OH)2. What is the Molarity of the Mg(OH)2 ?

Bell Work 3 / KHP Lab 1. In a standardization titration, 27.4mL of Ba(OH)2 are added to a 3.29 g of KHP. What is the molarity of the Ba(OH)2? (don’t forget to look-up formula for KHP)

Bell Work 4 / Titration and pH 1. What is the pH of a Solution of Mg(OH)2 if you titrate 25.2 mL with 22.6ml of 0.000025 M HCl.

Bell Work 5 / Review Mutiple Choice Questions

Bell Work 6 / titration Graph

Bell Work 7 / Determining pH of Weak Acid 1. What is the pH of a 1.45 M solution of acetic acid (Ka = 1.8x10-5)?

Bell Work 8 / pH of a Weak Acid 1. A beaker contains 100 milliters of a solution of hypochlorous acid, HOCl of unknown concentration.   a. The solution was titrated with 0.100 M NaOH solution, and the equivalence point was reached when 40.0 mL of NaOH solution was added. What was the original concentration of the HOCl solution? b. If the original HOCl solution had a pH of 4.46, what is the value of Ka for HOCl? c. What percent of the HOCl molecules were ionized in the original solution? d. What is the concentration of OCL-1 ions in the solution at the equivalence point reached in (a)?

BaF2 (s)  Ba+2 (aq) + 2 F-1 (aq) Bell Work 9 / Ksp of BaF2 BaF2 (s)  Ba+2 (aq) + 2 F-1 (aq) The value of the solubility product, Ksp for the reaction is 1.0 x 10-6 at 25 0C. 1. Write the Ksp expression for BaF2   2. What is the concentration of F-1 ions in a saturated solution of BaF2 at 25 0C?

Bell Work 10 / Ksp and Common Ion 1. What is the [Mg2+] in a saturated solution of magnesium fluoride, MgF2 if its solubility product constant is 6.4 x 10-9?  Recalculate the [Mg2+] if the solution also contains 0.25 M sodium fluoride.

Bell Work 11 / Keq 1. Bromine and chlorine react to produce bromine monochloride according to the equation. Kc = 36.0 under the conditions of the experiment. Br2(g) + Cl2(g) ↔ 2 BrCl(g) If 0.180 moles of bromine gas and 0.180 moles of chlorine gas are introduced into a 3.0 Liter flask and allowed to come to equilibrium, what is the equilibrium concentration of the bromine monochloride? How much BrCl is produced?

Bell Work 12 / Q Vs. Ksp 1. Will a precipitate form when 100.0 mL of 4.0 x 10-4 M Mg(NO3)2 is added to 100.0 mL of 2.0 x 10-4 M NaOH?

Bell Work 13 / LeChatelier’s