0:06 we'll now look at the equilibrium
0:09 between a Cobalt water complex ion which
0:12 is pink and a cobalt chloride complex
0:14 ion which is blue we'll start with two
0:17 test tubes with the Cobalt water complex
0:20 ion we add 12 M hydrochloric acid to one
0:23 of the tubes we notice that the solution
0:25 turns blue this indicates that the
0:27 equilibrium has shifted in the reverse
0:30 Direction the hydrochloric acid provides
0:32 a source of chloride ion as we increase
0:34 the concentration of the product the
0:36 equilibrium shifts in the reverse
0:39 direction to use up the added chloride
0:47 tube we notice that the solution has
0:50 turned back to Pink by adding water to
0:52 the solution we've shifted the
1:00 Direction we'll start with two tests
1:03 tubes with the Cobalt water complex ion
1:06 we add 12 M hydrochloric acid to one of
1:08 the tubes we notice that the solution
1:10 turns blue this indicates that the
1:12 equilibrium has shifted in the reverse
1:15 Direction the hydrochloric acid provides
1:18 a source of chloride ion as we increase
1:20 the concentration of the product the
1:21 equilibrium shifts in the reverse
1:24 direction to use up the added chloride
1:28 ion we will now add some silver nitrate
1:30 solution to the Cobalt chloride complex
1:33 ion we notice the formation of a white
1:35 solid which is the silver
1:37 chloride we also notice that the
1:40 solution is turned from Blue to Pink the
1:43 silver ion removes chloride ion from
1:46 solution as solid silver chloride the
1:48 equilibrium shifts in the forward
1:50 direction to try and replace the
1:52 chloride ion that's been
1:55 removed we're going to take a test tube
1:58 containing the equilibrium mixture the
2:00 solution is Pink
2:01 indicating that we have a high
2:04 concentration of the Cobalt water
2:06 complex ion we're going to put this into
2:08 a warm water
2:11 bath as we warm the solution the
2:14 solution turns from being pink to blue
2:17 if you heat an equilibrium mixture the
2:18 equilibrium will shift in the
2:20 endothermic Direction This is an
2:23 indication that that this reaction is
2:25 endothermic in the reverse Direction
2:27 cooling a reaction mixture shifts the
2:30 equilibrium in the exothermic
2:33 direction we notice that as we cool this
2:36 the solution goes from being blue to
2:39 Pink indicating that the reaction is
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