When water is mixed with a little copper sulphate to form a mixture. What will be left behind as residue if the mixture is filtered?

When water is mixed with copper sulfate and the mixture is filtered, the soluble copper sulfate will pass through the filter paper, leaving any insoluble impurities behind as residue. However, since copper sulfate is soluble in water, the residue would typically be minimal or nonexistent unless there are other insoluble substances present in the mixture. If pure copper sulfate is used, the filtrate will contain the dissolved copper sulfate and no solid residue will remain on the filter.