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mixer [17]
3 years ago
10

At pH ___, the pentapeptide Ala-Glu-His-Val-Cys would contain two positively charged groups and one negatively charged group.

Chemistry
1 answer:
REY [17]3 years ago
3 0

Answer:

3

Explanation:

At pH 3, the pentapeptide Ala-Glu-His-Val-Cys would contain two positively charged groups and one negatively charged group.

This is evident in that peptides have both carboxylic and amino groups.

Given that peptides have a certain amount of H⁺ and OH⁻ ions, it converts to zwitterions.

This conversion process is based on pKₐ and pKb of the acid and the base accordingly.

Therefore, they have two positively charged groups and one negatively charged grou

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Answer: I believe the 1st and 3rd reactions are better obtained through reference sources and the 2nd and 4th are easiest and safest to measure in the laboratory.

Explanation:

I am also working on this Pre-lab right now, and I looked back at the first question to help get my answer. In the first question (a), it is noted that ammonia gas and gaseous hydrochloric acid are both potentially dangerous in gaseous form. I saw that both the 1st and 3rd reactions contained noxious gases (I knew this because there was a (g) in both of these reactions). Using the knowledge from the first question that the noxious gases were potentially dangerous, I assumed that those reactions were the ones that are better obtained through the reference sources. The 2nd and 4th reactions did not contain any noxious gases, so I assumed those ones were easiest and safest to measure in the laboratory. Hope this helps!

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3 years ago
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Answer:

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