WCLN - Iodine Clock Reaction - Chemistry

Chemistry 12 - Iodine Clock Reaction Lab http://www.BCLearningNetwork.com. 0:03ok today we're going to be doing the 0:06iodine clock reaction this is actually a 0:10really awesome ranch the first time I 0:12saw this one it was 0:14Wow remember the first like we did in 0:17the first unit rates of reaction we 0:21found out that temperature concentration 0:25and surface area affects the reaction 0:28what we're going to be doing today is 0:30we're going to be doing and using 0:32different reactions to cover the same 0:34topics but in this case the reaction 0:38takes place in two steps in the first 0:41step we notice the ID ati on reacts with 0:45the buy/sell flight to create the I 0:48minus ion in the second reaction the 0:52idea I'm reacts with the i- produced to 0:56produce a wonderful blue color now the 0:59neat thing about this is if we vary the 1:01concentrations we can change the rate of 1:05the reaction what we'll be doing is 1:07measuring the different rates of 1:08reaction at different concentrations so 1:12let's see what happens we'll just zoom 1:13in here so mixing solution a task my day 1:21with solution be 1:29remember to watch please 1:35Wow is not amazing i tell you the first 1:38time i saw that i was impressed 1:41we're just going to stay soon and we'll 1:45do the other parts of the lab the second 1:49test we're using is now nine mils gaseum 1:54I'd a dilated to 10 mils also mixing it 1:58with 10 mils of solution be remember to 2:05mix thoroughly I tell you every time I 2:11see it I'm still impressed or moving 2:14aside what we can you could we can use 2:17them the clock on the player on the 2:21native player that you're using to 2:23measure the rate what I'll also be doing 2:25does not make sure to put up a table for 2:30you with the times 2:36you'll notice one thing right away is 2:40that the reactions are taking a little 2:44bit more time to the good mix and wait 2:53for it and notice the appearing of this 2:57time the blue color takes a little bit 3:00longer now it's up to you to think about 3:06why 3:07and lastly we're down to three mils of 3:12potassium iodate done it to 10 miles of 3:15water watching carefully 3:33and we're still watching you'll notice 3:37this one is taking a little bit longer 3:39now from the first experiment what we 3:48notice is that concentration affects the 3:52rate of a reaction remember please any 3:55calculations that you do or graphs that 3:58you make 3:58please show all of your work thank you 4:01very much