Please help me with the following question:) What was the purpose of tube A?
Please help me with the following question:) What was the purpose of tube A?
Procedure:
1. Prepare a stock albumen solution by adding the white of one egg to 100 mL of distilled water in a beaker. Stir until the albumen is in solution.
Place 5 mL of the albumen solution into each of four test tubes. Label the tubes A,B,C,D
Tube A- Let stand at room temperature. Measure the temperature. Determine the pH with pH paper.
Tube B - Heat the tube in a boiling water bath for 10 minutes.
Tube C - Add 2 mL of 1M HCI. Determine the pH of the solution.
Tube D - Add 5 drops of 2% AgNO3 (a salt of the heavy metal silver).
My Observations
Tube Temperature pH appearance
A 21 degrees 7 clear colourless solution
B 100 degrees 7 opaque, white substance
C 21 degrees 2 opaque, white substance
D 21 degrees 7 opaque, white substance
I have been stumped on this question for the last several days
Thanks
2007-10-14 11:08:08 · 2 answers · asked by Mark F 1 in Science & Mathematics ➔ Chemistry
It is your control.
You have this so you know what the outcome will look like if nothing were to happen.
2007-10-14 11:11:47 · answer #1 · answered by Jean-Guy 3 · 1⤊ 0⤋
Tube A was a control. The other three tubes were subjected to conditions that denatured the protein.
2007-10-14 18:14:17 · answer #2 · answered by steve_geo1 7 · 1⤊ 0⤋