Phosphoric acid is a triprotic acid (K₁1 = 6.9 x 10³, K₁2 = 6.2 x 10%, and K3 = 4.8 × 10-1³). To find the pH of a buffer composed of H,PO, (aq) and HPO (aq), which pK, value should be used in the Henderson Hasselbalch equation? OPK₁1 =2.16 OPK₁2 =7.21 OPK₁3 = 12.32 Calculate the pH of a buffer solution obtained by dissolving 29.0 g of KH, PO, (s) and 42.0 g of Na, HPO, (s) in water and then diluting to 1.00 L. pH =

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Chapter16: Acid-base Equilibria
Section: Chapter Questions
Problem 16.141QP: Ka for formic acid is 1.7 104 at 25C. A buffer is made by mixing 529 mL of 0.465 M formic acid,...
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Phosphoric acid is a triprotic acid (K₁1 = 6.9 x 10¹, K2 =6.2 x 10-, and K₁3 = 4.8 x 10-13).
To find the pH of a buffer composed of H, PO, (aq) and HPO (aq), which pK, value should be used in the
Henderson-Hasselbalch equation?
OPK₁1 = 2.16
OPK₁2 = 7.21
OPK₁3 = 12.32
Calculate the pH of a buffer solution obtained by dissolving 29.0 g of KH PO, (s) and 42.0 g of Na, HPO, (s) in water and then
diluting to 1.00 L.
pH =
Transcribed Image Text:Phosphoric acid is a triprotic acid (K₁1 = 6.9 x 10¹, K2 =6.2 x 10-, and K₁3 = 4.8 x 10-13). To find the pH of a buffer composed of H, PO, (aq) and HPO (aq), which pK, value should be used in the Henderson-Hasselbalch equation? OPK₁1 = 2.16 OPK₁2 = 7.21 OPK₁3 = 12.32 Calculate the pH of a buffer solution obtained by dissolving 29.0 g of KH PO, (s) and 42.0 g of Na, HPO, (s) in water and then diluting to 1.00 L. pH =
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