A buffer, consisting of H₂PO4 and HPO42, helps control the pH of physiological fluids. Many carbonated soft drinks also use this buffer system. What is the pH of a soft drink in which the buffer ingredients are 6.50 g of NaH2PO4 and 8.00 g of Na2HPO4 per 355 mL of solution? The Ka of H₂PO4 is 6.20 x 10-8.

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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.