charlotte has some copper sulfate solution. she wants solid copper sulfate. which technique should she use?

Charlotte should use the technique of crystallization to obtain solid copper sulfate from her copper sulfate solution. In this method, she would heat the copper sulfate solution gently to evaporate excess water, leaving a saturated solution. Upon cooling, solid copper sulfate crystals will form and can then be collected. This process allows pure solid crystals to be separated from the solution effectively.