Question: Question 27 6 Points A) Explain the following: (3 pts) 1. Zn2+ has sharper equivalence point than Mg2+ in EDTA titrations. 2. Thermally unstable substances

Question 27 6 Points A) Explain the following: (3 pts) 1. Zn2+ has sharper equivalence point than Mg2+ in EDTA titrations. 2. Thermally unstable substances cannot be analyzed by GLC 3. When CH3COOH titrated with NaOH, the pH of the solution at the equivalence point more than 7. B) Solve the following problems: (3 pts) 1. What is the component concentration ratio, (HNO37/[NO2), of an acidic buffer solution made from HNO, and NaNO, that has a pH =pKa +12 2. What is the most effective pH buffering range for a nitrous acid, HNO/NO2 buffer. [Nitrous acid, Ka - 4.6 x 104] Use the editor to formot your

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