You examine the buffering capacity of three unknown solutions by conducting an e

Q: You examine the buffering capacity of three unknown solutions by conducting an e

3. Solution Z Explanation: Buffers are made up of weak acid and its conjugate base. A buffer that absorbs more acid before it breaks is said to have a higher buffer capacity. The effectiveness of a buffer is determined by concentrations of A- and HA

ID: 100299 • Letter: Y

Question

You examine the buffering capacity of three unknown solutions by conducting an experiment where you slowly add 0.01M HCl to each solution until the solution is neutralized. Phenol red is used to indicate the pH of the solution (basic, neutral, or acidic). The initial color of each solution is recorded Table 2 below. You record the amount of HCl added to each beaker to reach neutralization. Results of this experiment are below. Based on the results, which of three solutions, X, Y, or Z, is the best buffer? Explain your answer, using evidence from your own lab's results for Exercise 3. You suspect that one of the solutions contained sodium bicarbonate. Which one and why? Name one characteristic of a good buffer. In Exercise 3 of the lab, you're supposed to record the color of the solution and the pH of the solution. When do you stop recording? Why?

Explanation / Answer

3. Solution Z

Explanation: Buffers are made up of weak acid and its conjugate base. A buffer that absorbs more acid before it breaks is said to have a higher buffer capacity. The effectiveness of a buffer is determined by concentrations of A- and HA

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You examine four populations each with allele frequencies of p=q=0.50. You mate

You examine the buffering capacity of three unknown solutions by conducting an e

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You examine the buffering capacity of three unknown solutions by conducting an e

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