Answer to Question #184781 in General Chemistry for lynn

Question

In a lab, you are studying a new chemical reaction involving a weak base, B. This chemical reaction is pH sensitive and is most efficient in a solution with a pH of 4.50.

Your idiot boss gives you the following solutions and commands you to create 52.5 mL of a pH 4.50 buffer solution with a total concentration of 0.100 M. Calculate the volume of each component (in mL) and the volume of water (in mL) that is required to make the buffer. (10 pts)H3A: pKa1 = 1.579, pKa2 = 4.801, pKa3 = 7.589.

• 0.150 M H3A
• 0.200 M NaH2A
• 0.100 M K2HA
• 0.0500 M Na3A

1. 0.0500 mol of the weak base, B (pKb = 10.1734) is dissolved in the pH 4.50 buffer. Calculate the percent protonation of B in the buffer. (5 pts)

Answer 1

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