pH and pOH WS The Basics: 1. Name or write the formula for the following Acids and Bases H2SO3 _______________________________________ hydrofluoric acid ____________________________ H2S _______________________________________ hydroselenic acid ____________________________ H3PO4 _______________________________________ carbonic acid ____________________________ NH3 _______________________________________ lithium hydroxide ____________________________ HCN _______________________________________ nitrous acid _____________________________ Ca(OH)2 _____________________________________ cobalt (II) hydroxide _____________________________ Fe(OH)3 _____________________________________ sulfuric acid _____________________________ H3P _______________________________________ hydrobromic acid _____________________________ 2. Label each of the following as an acid, base, or both. a. pH= 1.7 f. changes the color of indicators b. forms electrolytes



g. feels slippery like soap

c. pH=7.1







h. H2CO3

d. tastes bitter





i. is part of a neutralization reaction

e. NH3





j. tastes sour







3. On the line at left, write the letter of the definition that best matches each term. _____neutral solution a. has H30+ concentration greater than 1x10-7 M _____pure water b. has H30+ and OH- concentrations of 1x10-7 M _____basic solution c. has a pH greater than 7 _____pH scale e. describes the acidity or basicity of a solution _____acidic solution f. has a pH =7; may contain ions other than H3O+ and OH- 4. Complete the following table: [H+] (MOL/L) [OH-] (MOL/L) PH POH ACID, BASE, OR NEUTRAL? -6 1.34 x10 -10 2.54 x10 2.6 5.9 2.76 x10-1 -2 9.25 x10 12.5 2.89



5. A solution is prepared in which 0.600 mole of hydrochloric acid is dissolved in enough water to make a 1500.0 mL acid solution. What is the pH of the solution?

6. You start with 500.0 mL of a 0.89 M solution of HCl. To this solution, you add 300.0 mL of water. What is the pH of the initial solution AND the final solution? Assume 100% ionization.

7. You dissolve 0.89 grams of calcium hydroxide in 100.0 mL of water. What is the pH of the final solution?

8. You have 150.0 mL of a 0.015 M phosphorous acid solution. a. What is the [H+]? b. What is the [OH-]? c. What is the pH? d. What is the pOH?