The variable is what changes during an experiment. Hopefully this helped! :)
Answer:
because both liquid are made from different substances.
Explanation:
I think it is called a loess. Please correct me if I am wrong.
<span>In the written directions the indicator that the matter contains protein is when the solution turns a purple color. Therefore we can conclude that if your sample causes the solution of Copper Sulfate and Sodium Hydroxide to turn purple, it does indeed contain protein.</span>