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在化学教学中适时补充以下实验，可以使我们的化学教学更加贴近生活实际。1．交警怎样检查驾驶人员酒后开车分别取半药匙橙红色重铬酸钾（K2CY2O7）晶体和白色二氧化硅（或用研细的玻璃粉代替）在蒸发皿中混合均匀，缓慢加入1至2mL浓硫酸，用玻璃棒调制成糊状样，再分做以下3项
In the chemistry teaching timely supplement the following experiment, can make our chemistry teaching closer to life reality. 1. Traffic police how to check the driver drunk driving take half a medicine spoon orange red potassium dichromate (K2CY2O7) crystals and white silica (or with fine glass powder instead) in the evaporating dish mixed slowly by adding 1 to 2mL Concentrated sulfuric acid, with a glass rod into a paste-like modulation, and then divided into the following three