Question

a) A buffer solution is prepared by mixing 228 mL of 0.250 mol/L benzoic acid (C6H5COOH) with 125 mL of 0.300 mol/L sodium benzoate (C6H5COONa). Calculate the initial pH of the buffer. b) Calculate the new pH of the buffer after addition of 1.1951 g of KOH to the buffer solution (assume the dissolution of the KOH does not affect the volume of the buffer). The Ka for benzoic acid is 6.46 x 10-5

Name: a a buffer solution is prepared by mixing 228 ml of 0250 moll benzoic acid c6h5cooh with 125 ml of 0300 moll sodium benzoate c6h5coona calculate the initial ph of the buffer b calculate the 77765
Uploaded: 2023-05-22T13:44:39-08:00
Duration: 3 min 48 s
Channel: David Collins
Description: a a buffer solution is prepared by mixing 228 ml of 0250 moll benzoic acid c6h5cooh with 125 ml of 0300 moll sodium benzoate c6h5coona calculate the initial ph of the buffer b calculate the 77765

          a) A buffer solution is prepared by mixing 228 mL of 0.250 mol/L
benzoic acid (C6H5COOH) with 125 mL of 0.300 mol/L sodium benzoate
(C6H5COONa). Calculate the initial pH of the buffer.
b) Calculate the new pH of the buffer after addition of 1.1951 g
of KOH to the buffer solution (assume the dissolution of the KOH
does not affect the volume of the buffer). The Ka for benzoic acid
is 6.46 x 10-5

Added by Rafael C.

Chemistry: Structure and Properties

Nivaldo Tro 2nd Edition

Instant Answer

Solved by Expert David Collins

05/22/2023

Step 1

For benzoic acid: Initial moles = volume × concentration = 0.228 L × 0.250 mol/L = 0.057 mol For sodium benzoate: Initial moles = volume × concentration = 0.125 L × 0.300 mol/L = 0.0375 mol Total volume of the buffer solution = 228 mL + 125 mL = 353 mL = 0.353 Show more…

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a) A buffer solution is prepared by mixing 228 mL of 0.250 mol/L benzoic acid (C6H5COOH) with 125 mL of 0.300 mol/L sodium benzoate (C6H5COONa). Calculate the initial pH of the buffer. b) Calculate the new pH of the buffer after addition of 1.1951 g of KOH to the buffer solution (assume the dissolution of the KOH does not affect the volume of the buffer). The Ka for benzoic acid is 6.46 x 10-5