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小苏打和白醋反应后会生成二氧化碳气体,这个实验的操作难点是如何让产生的二氧化碳分别熄灭上下两支燃烧的蜡烛,且要先熄灭下面的蜡烛,后熄灭上面的蜡烛。一、改进措施经过实践笔者发现,整个实验的成功率不高,但从理论上来说,8.4 g的小苏打完全可以产生2.24 L的二氧化碳。这说明不是醋或小苏打的量不够,而是实验装置有问题。基于以上思考,笔者做了如下尝试。
The reaction between baking soda and white vinegar generates carbon dioxide gas. The tricky operation of this experiment is to make the generated carbon dioxide extinguish the upper and lower two burning candles respectively, and extinguish the following ones first and then extinguish the upper ones. First, the improvement measures After the author found that the success rate of the experiment is not high, but in theory, 8.4 g of baking soda can produce 2.24 L of carbon dioxide. This shows that not the amount of vinegar or baking soda is not enough, but the experimental device has a problem. Based on the above thinking, I made the following attempt.