1. Calculate the pH of a 0.05 M solution of HCl. 2. Calculate the pH of a 0.1 M solution of NaOH. 3. Calculate the pH of an acetic acid solution in which [CH3COO - ] = 0.037 M and [CH3COOH] = 0.044 M. (pKa = 4.76)
1. Calculate the pH of a 0.05 M solution of HCl.
2. Calculate the pH of a 0.1 M solution of NaOH.
3. Calculate the pH of an acetic acid solution in which [CH3COO - ] = 0.037 M and [CH3COOH] = 0.044 M. (pKa = 4.76)
4. You are conducting a biochemical experiment with an enzyme that has optimal activity at pH = 10.00. You decide to use carbonate (pKa1 = 6.38, pKa2 = 10.30) as the buffer to keep the pH stable throughout the enzymatic reaction. (Recall that the formula for carbonic acid is H2CO3.) You prepare a 0.5 M solution of carbonate buffer at pH = 10.00. Calculate the concentrations of the major carbonate species in your solution.
5. Calculate the pH of the buffer solution in which [H3PO4] = 0.038 M and [H2PO4 - ] = 0.046 M (pKa1 = 2.12, pKa2 = 7.21, pKa3 = 12.32).
6. Add 5.0 mL of 0.1 M NaOH to 80 mL of buffer from question 5 and calculate the pH.
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