context: Heated copper sulphate (pentahydrate), containing five water molecules, decomposes / decomposes before reaching its melting point 150 ° C (302 ° F). At first 63 ° C (145 ° F) loses two water molecules, and then at 109 ° C (228 ° F) two more water molecules. The last molecule is lost at 200 ° C (392 ° F).
question: What is the melting point of copper sulfate?
answers.text: 150 ° C