You are given five different aqueous copper sulfate standard solutions. Color comparisons of these solutions by colorimetry were ranked from 1 to 5. (see the table below) Where

1 = lightest blue solution and 5 = highest blue solution

The concentration of Standard CuSO4	0.300 M	0.500 M	0.700 M	0.900 M	1.100 M
Colorimetric Rank	1	2	3	4	5

X g of unknown copper carbonate was dissolved in aqueous sulfuric acid and analyzed by the same colorimeter. Results revealed its rank as 3.76.

(1). What is the concentration of copper in this solution?

(2). Assuming X = 1.620 g and the volume of the prepared solution is 50.00 mL, Determine the % of copper in the copper carbonate sample.

(3). Do you have an analaR copper carbonate sample?