Here is another example of an exothermic reaction. This reaction is actually two steps. First, the decomposition of the potassium chlorate, which creates oxygen. The oxygen in turn fuels the combustion of sucrose.
Can you predict the two equations happening here? You might need to do some research to figure out the formula for potassium chlorate and sucrose.
In this experiment potassium chlorate is being reduced to potassium chloride. This first equation is 2KCl3-->2KCl + 3O2. The products are Potassium chloride solid and oxygen gas. The second part of the reaction is glucose being converted into carbon dioxide and water. the equation for this is C6H12O6 + 6O2 --> 6CO2 + 6H2O. This takes a solid glucose and oxygen gas and the products are carbon dioxide gas and water as a solution.
ReplyDeleteThis video makes me more excited about chapter 11 because when I think of chemistry, I think of chemical reactions and this is a good example of one!
ReplyDeleteAfter watching this video I researched the two formulas -- Potassium chlorate is KClO3 and Sucrose is C12H22O11. Why did this cause the gummy bear to burn?
ReplyDelete--Morgan Wheeler
"You can hear it screaming." -Kira Pilger
ReplyDeleteWhat would an exothermic reaction like this look like on a bigger scale? (not in a test tube)
The equation of this reaction is KCl3 -->KCl + O2 which was an exothermic and combustion reaction. THe balanced equation of this reaction is 2KCl3-->2KCl + 3O2.
ReplyDeleteThat small amount of liquid combined with a tiny gummy bear makes a pretty rough reaction, I wonder what it would look like if you put more liquid in a bigger beaker with a whole bunch of gummy bears. And also, I was wondering if the reaction in the test tube is a liquid or a gas...it looks like both were produced.
ReplyDeleteThe formula for potassium chlorate would be KClO3.
ReplyDeleteIf gummy bears are mostly made out of sucrose, would sucrose be unhealthy for you?
Would the reaction be larger if more than one gummy bear was added to the test tube?
What happens to the other ingredients of the gummy bear when this reaction takes place? Are they still present in the remaining substance after the reaction has subsided? Would the reaction be the same, or more intensified if pure sucrose was used instead of the bear?
ReplyDeletewhy dosent the glass start to break? that is a pretty big reaction compared to the size of the small gummy bear! why is there smoke coming out of the pipet and where did all the liquid go??
ReplyDeleteIt was really impressive seeing something simple as a gummy bear being added to something else to produce such a drastic chemical reaction. A lot of energy in the form of light was released. The potassium chlorate really burned off the sucrose, creating a quick but effective change
ReplyDelete