42中講稿ppt-南京曉莊學院(存儲版)
【正文】 1. Reaction with water a property as an acidic oxide SO2 + H2O H2SO3 reversible reaction Chemical Properties 化學性質(zhì) 可逆反應 Let’s share the information and ideas！ a) Collect water samples from around your home and school. You may collect water from all types of sources, like rain, lakes, snow, tap water, etc. Make sure you store your samples in clean glass jars (well rinsed, without any soap residue). b) Label each jar with: the date the sample was collected the source (such as, river, rain, puddle, snow) where and how it was collected the time of day it was collected c) Check the pH level of each water sample. Be sure to check your samples as quickly as possible after you have collected them. d) Record the pH levels in a chart that looks something like this: e) Map your results: Draw a map of your area and record the pH level results on the map. Be sure to write the dates beside the levels so you can pare your results later on. f) Optional n
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