All of the following mixtures in 1 L of water result in theformation of a buffer

Question

All of the following mixtures in 1 L of water result in theformation of a buffer solution except: Explain. a. 0.40 mol NH3 and 0.10 mol HCl b. 0.20 mol CH3COOH and 0.10 mol NaCH3COO c. 0.20 mol CH3COOH and 0.10 mol NaOH d. 0.20 mol NaCH3COO and 0.10 mol NaOH e. 0.10 mol NaHCO3 and 0.10 mol Na2CO3 All of the following mixtures in 1 L of water result in theformation of a buffer solution except: Explain. a. 0.40 mol NH3 and 0.10 mol HCl b. 0.20 mol CH3COOH and 0.10 mol NaCH3COO c. 0.20 mol CH3COOH and 0.10 mol NaOH d. 0.20 mol NaCH3COO and 0.10 mol NaOH e. 0.10 mol NaHCO3 and 0.10 mol Na2CO3

Explanation / Answer

A buffer is defined as a mixture of a weak acid and its conjugatebase. a. Addition of HCl will convert some of the ammonia into ammonium.This will be a buffer, as you have a weak acid and conjugatebase b. classic definition of a buffer c. The NaOH will convert some of the acetic acid into acetate ion,leaving you with conjugate acid and base d. This is a conjugate base and a strong base. Not abuffer. e. Again, weak acid and its conjugate base. It is a buffer. So yeah, it's D.

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