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16 Nov 2019
You are to prepare 100. mL of an acetate buffer of pH 5.00 using 1.0 M acetic acid (HC_2H_3O_2) and solid sodium acetate (NaC_2H_3O_2). To prepare for the investigation, complete the following calculations. The pK_a for HC_2H_3O_2 is 4.75. (a) What ratio of [NaC_2H_3O_2] to [HC_2H_3O_2] is required? (b) You will want the concentrations relatively dilute, so use an acid concentration of 0.10 M. What volume of 1.0 M HC_2H_3O_2 would be needed to prepare 100. mL of buffer with an acid concentration of 0.10 M? c) How many grams of NaC_2H_3O_2 middot 3 H_2O would be needed to prepare 100. mL of buffer if the acid concentration is 0.10 M? (d) If you add 2.4 mL of 0.500 M NaOH to 25.0 mL of the buffer, what is the new pH?
You are to prepare 100. mL of an acetate buffer of pH 5.00 using 1.0 M acetic acid (HC_2H_3O_2) and solid sodium acetate (NaC_2H_3O_2). To prepare for the investigation, complete the following calculations. The pK_a for HC_2H_3O_2 is 4.75. (a) What ratio of [NaC_2H_3O_2] to [HC_2H_3O_2] is required? (b) You will want the concentrations relatively dilute, so use an acid concentration of 0.10 M. What volume of 1.0 M HC_2H_3O_2 would be needed to prepare 100. mL of buffer with an acid concentration of 0.10 M? c) How many grams of NaC_2H_3O_2 middot 3 H_2O would be needed to prepare 100. mL of buffer if the acid concentration is 0.10 M? (d) If you add 2.4 mL of 0.500 M NaOH to 25.0 mL of the buffer, what is the new pH?
Beverley SmithLv2
9 Nov 2019