You are making a potassium phosphate buffer that has 50 mM total phosphate (weighed out as KH2PO4), 160 mM KCl, and 7 mM dithiothreitol. You need 377 mL of buffer, which will be titrated to pH 50. What volume of a 2 M KH2PO4 stock solution should you add to the flask before diluting it to the final volume for your buffer? Report the volume in mL to the nearest 0.1 mL.

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Acid Base Titration

An acid-base titration is the method of quantitative analysis for determining the concentration of an acid and base by exactly neutralizing it with a standard solution of base or acid having known concentration.