Fire and Ice Science Experiment - Chemical Reactions Demonstration скачать в хорошем качестве

Fire and Ice Science Experiment - Chemical Reactions Demonstration

Craig Beals from Beals Science shows a series of chemical reactions that he uses in his high school chemistry class during Valentine's Day. The following reactions are shown: Single Replacement Reaction as calcium reacts with water to make hydrogen gas and calcium hydroxide. When phenolphthalein, a color-changing acid/base indicator, is added, the solution turns pink because the calcium hydroxide that forms is very basic. The second reaction is a combustion reaction when the hydrogen that was produced in the first reaction is lit on fire and reacts with oxygen. Finally, a double replacement reaction occurs when the calcium hydroxide produced in the first reaction interacts with hydrochloric acid. This neutralization reaction changes the color of the phenolphthalein back to clear as the solution becomes acidic and the calcium chloride that forms starts to fall like snow to the bottom of the test tube. https://www.BealsScience.com   / craigbealsscience     / bealsscience     / bealsscience   SUBSCRIBE and Ring the Bell: https://goo.gl/bVnT8F WARNING: This video is only for entertainment purposes. If you rely on the information outlined in this video, you assume responsibility for the results. As with any experiment, proceed at your own risk.