The student's lab manual says to mix some of his na2co3 solution with an aqueous solution of copper(ii) sulfate (cuso4)

what evidence of a chemical reaction would he expect to see? explain your answer.

If there is a reaction, the most obvious evidence is a color change.

CuSO4 in water is an indescribable blue. In fact it is nicknamed bluestone.

If it reacts to become CuCO3 the color goes to green.

A second piece of evidence is that the CuCO3 is insoluble in a water solution. It will form a precipitate. CuSO4 is very soluble so not only will the color disappear it will be a green solid on the bottom of the container.

chemical digestion occurs in the stomach were hcl and pepsin forms chyme, the mouth in which salivary amylase breaks down starch to form bolus, and the small intestine specifically the duodenum.

a 20-cm-long, cylindrical graphite (pure carbon) rod is inserted into an oxidizing atmosphere at 1145 k and 1.013 x 105 pa pressure. the oxidizing process is limited by the diffu- sion of oxygen counterflow to the carbon monoxide that is formed on the cylindrical surface.