Question

question 10 0.15 pts what color change will indicate that a protein molecule is present when doing the biuret test? blue to white orange to blue - black blue to red blue to violet/purple question 11 0.15 pts please match the ph with its description a soultion with a ph of 3 choose a soultion with a ph of 12 choose a soultion with a ph of 7 choose

Explanation:

For Question 10, the biuret test is a common chemical test for proteins. Biuret reagent is blue, and in the presence of proteins, it changes to violet - purple due to the reaction between peptide bonds in proteins and the copper ions in the biuret reagent. For Question 11, a pH scale ranges from 0 - 14. A pH of 7 is neutral, a pH less than 7 is acidic, and a pH greater than 7 is basic. So a solution with pH 3 is acidic, a solution with pH 12 is basic, and a solution with pH 7 is neutral.

Answer:

Question 10: blue to violet/purple
Question 11:
A solution with a pH of 3: Acidic
A solution with a pH of 12: Basic
A solution with a pH of 7: Neutral