Question

You are asked to prepare a pH=4.00 buffer starting from 1.50 L of 0.0200 \; M solution of benzoic acid C_6 H_5COOH and an excess of sodium benzoate C_ H_5 COONa.

How many grams of sodium benzoate should be added to prepare the buffer? Neglect the small volume change that occurs when the sodium benzoate is added. (in grams)
Use the HH equation to determine mols sodium benzoate, then mols = grams/molar mass.
48

Related Questions

You are asked to prepare a pH = 4.00 buffer starting from 1.50 L of 0.0200 M solution of benzoic aci... You are asked to prepare 500. mL of a 0.250 M acetate buffer at pH 4.90 using only pure acetic acid... A buffer consisting of H2PO4- and HPO42-, helps control the pH of physiological fluids. Many carbona...