1) 2,4,6-Trimethylpyridine (also called 2,4,6-collidine) (shown in figure 1) consists of a pyridine ring substituted with three methyl groups. It is often used as a buffer because of its high stability and its biologically relevant pH range. In this problem we will make a buffer with 2,4,6-collidine (pka = 7.43). H3C N. CH3 a) Typically the buffer is prepared from a 0.400M stock solution of 2,4,6-Collidine and 1.00M HCI to adjust the pH. What volume of stock and what volume of titrant would be needed to make 250ml of a buffer with 0.200M total concentration at pH = 7.25? [note: you may also use Dl water to get the correct total volume] CH3
Ionic Equilibrium
Chemical equilibrium and ionic equilibrium are two major concepts in chemistry. Ionic equilibrium deals with the equilibrium involved in an ionization process while chemical equilibrium deals with the equilibrium during a chemical change. Ionic equilibrium is established between the ions and unionized species in a system. Understanding the concept of ionic equilibrium is very important to answer the questions related to certain chemical reactions in chemistry.
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A8
![1) 2,4,6-Trimethylpyridine (also called 2,4,6-collidine) (shown in figure 1) consists of a pyridine ring substituted
with three methyl groups. It is often used as a buffer because of its high stability and its biologically relevant pH
range. In this problem we will make a buffer with 2,4,6-collidine (pKa = 7.43).
H3C
N
CH3
a) Typically the buffer is prepared from a 0.400M stock solution of
2,4,6-Collidine and 1.00M HCI to adjust the pH. What volume of
stock and what volume of titrant would be needed to make 250ml of
a buffer with 0.200M total concentration at pH = 7.25? [note: you
may also use Dl water to get the correct total volume]
CH3](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Faf24e36d-0f02-49db-b940-8c748bdb888a%2F77ea88b2-739f-4e21-9956-5c284b06bbce%2F0hb4ur_processed.jpeg&w=3840&q=75)
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