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Unformatted text preview: Name: _________________________________________ Date: ___________ WKST #19 pH and pOH Calculations Period: _________ 1. Write the chemical equilibrium equation that exists between water and its ions. 2. Write the equilibrium expression for pure water (K w ). 3. If the water sample is 100% pure, what are the concentrations of the hydronium and hydroxide ions? 4. When a base is added to water, the H 3 O + concentration _________ and the OH- concentration _________. When an acid is added to water, the H 3 O + concentration _________ and the OH- concentration __________. 5. For each acidic or basic solution below (assume complete dissociation): Write the dissociation equation Find the pH Find the pOH Remember to show your work! a. 0.0567 M HCl b. 3.35 x 10-5 M H 2 SO 4 c. 0.012 M Ca(OH) 2 d. 9.56 x 10-9 M HI 6. Which 0.1 M solution has a pH greater than 7? a. KCl b. CH 3 COOH c. C 6 H 12 O 6 d. KOH 7. Which of the following is most likely pH for a solution of a weak acid? Which of the following is most likely pH for a solution of a weak acid?...
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