1.What is the most effective pH buffering range for a alazarin yellow indicator? (benzoic acid Ka = 7.9 × 10-12) A. Cannot be determined. B. 5.3 – 7.3 C. 4.7 – 6.7 D. 8.8 – 10.8 E. 10.1 - 12.1
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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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Bronsted Lowry Base In Inorganic Chemistry
Bronsted-Lowry base in inorganic chemistry is any chemical substance that can accept a proton from the other chemical substance it is reacting with.
1.What is the most effective pH buffering range for a alazarin yellow indicator? (benzoic acid Ka = 7.9 × 10-12)
- A. Cannot be determined.
- B.
5.3 – 7.3
- C.
4.7 – 6.7
- D.
8.8 – 10.8
- E.
10.1 - 12.1
2. What is the dominant form of aspartic acid (a triprotic acid) at a pH of 1.50 (pKa1 = 1.990, pKa2 = 3.900, pKa3 = 10.002)?
- A.
H3A and H2A- are equal
- B.
H2A-
- C.
HA2-
- D.
H3A
3.
Determine pCl and pAg if 20 mL of a 0.1 M AgNO3 solution is titrated with 6 mL of 0.2 M HCl. pKsp(AgCl) = 9.8.
- A.
pAg = pCl = 4.9
- B.
pAg = 8.29 and pCl = 1.5
- C.
pAg = 9.8 and pCl is undetermined.
- D.
None of the above.
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