某校化学课外小组的同学们,利用课外时间查阅资料,确定了一份自制汽水的配方,看,就是这个:自制汽水在约500毫升的饮料瓶中加入2匙白糖和适量果汁,加入约1.5g小苏打(碳酸氢钠),注入凉开水,再加入约1.5g柠檬酸,立即旋紧瓶盖,摇匀,放入冰箱,半个小时后,你就可以喝到清凉甘甜的汽水了。(注:实验中应使用食品级的碳酸氢钠和柠檬酸。)提出问题他们按照这个配方自己试着作了一下,这时,小林同学提出了这样一个问题:小苏打与 A school chemistry extracurricular group of students, after hours of access to information to determine a homemade soda formula, see this is this: homemade soda in about 500 ml of beverage bottle add 2 tablespoons sugar and the amount of fruit juice, add about 1.5 g baking soda (sodium bicarbonate), into the cold water, then add about 1.5g of citric acid, immediately tighten the cap, shake, into the refrigerator, half an hour later, you can drink a cool sweet soda. (Note: food-grade sodium bicarbonate and citric acid should be used in the experiment.) Ask questions They tried to do this by themselves, and Kobayashi raised the question that baking soda