Acids/Bases Buffer Practice CHEM 314 Acids/Bases, pH, and Buffers PRACTICE Sprin

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Acids/Bases Buffer Practice

CHEM 314 Acids/Bases, pH, and Buffers PRACTICE Spring 2018 1. Provide the overall charge and the structure (showing correct protonation state) for phosphoric acid, H3POs at: a. pH 5 b. pH 8 C. pH 10 d. pH 13 e. pH 1 2. Calculate the pH and percent ionization for a 0.500 M Formic Acid solution. See Table 2.4 in your text for the appropriate Ka value. ANSWER (pH): Answer(% ionization); 3. Prepared lactate buffer has significant concentrations of both lactic acid and its conjugate base lactate present. Determine the relative concentrations (ratio) of these two species in a solution having a pH of 4.20. Wold this buffer respond better buffer more effectively) to added acid or added base? Briefly explain using proper chemistry Ratio: Explain: 4. Acetic acid has a pKa of 4.8. How many milliliters of 0.2 M acetic acid and 0.2 M sodium acetate are required to prepare 1 liter of 0.1 M buffer solution having a pH af 4.8? Answer: Page 1 of2

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Acids/Bases Buffer Practice CHEM 314 Acids/Bases, pH, and Buffers PRACTICE Sprin

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