检验化学反应生成水无水硫酸铜有极强的吸水性，无水硫酸铜固体遇水由白色变蓝色，生成五水硫酸铜（CuSO4·5H2O），可检验化学反应水的存在或生成，并吸收水蒸汽。注：CuSO4与CuSO4·5H2O都是纯净物。化学方程式：CuSO4+5H2O==CuSO4·5H2O（反应条件：加热）

Check that the anhydrous copper sulfate produced by chemical reaction has strong water absorption. When the anhydrous copper sulfate solid meets water, it changes from white to blue, and forms copper sulfate pentahydrate (CuSO4.5H2O). It can check the existence or formation of the chemical reaction water and absorb water vapor. Note: CuSO4 and CuSO4.5H_2O are pure substances. Chemical equation: CuSO4+5H2O==CuSO4.5H2O (reaction condition: heating)