SOLID NAIL nailive TIPS GEL 2-4-23 Data Sheet: Experiment...

SOLID NAIL nailive TIPS GEL 2-4-23 Data Sheet: Experiment 9 CHEMICAL REACTIONS II 3.1: Video demonstration of a displacement reaction. Write any observations below. What type of reaction is it? 3.2: Reactivity of metals with acid. Describe any reactions observed. What type of reactions are these? Tube Metal Color change Gas evolved Heat noted A copper NO NO NO B magnesium NO NO YES C zinc NO NO NO Write two molecular, complete ionic, and net ionic equations for reactions where you observed a color change, gas formation, or a heat change. Don't forget the physical states. molecular equation complete ionic equation net ionic equation Experiment 9 Chemical Reactions II 161 S. Man

Transcript

00:01 This problem asks us to write the net ionic equation for three different reactions.

00:07 Now, as a reminder, when you write out net ionic reactions, we're only going to include the important species in the reaction.

00:15 Those are the species that do the reaction.

00:18 The other species that get cancelled out are going to be the spectator species.

00:23 And this first one, i'll walk through more slowly so you can see what i mean by that.

00:27 So whenever we have an aqueous solution like this, it's going to dissociate completely.

00:38 And the things that dissociate completely are strong electrolytes.

00:41 And for our purposes in this problem, if we have an aqueous, it's going to be a strong electrolyte.

00:47 However, there are solubility rules that you need to know and use in order to identify strong electrolytes in different problems.

00:56 If it's a strong electrolyte, it's going to split up into its individual ions.

01:02 So silver splits up into its two different ions, and then nitrate splits up into its ions as well.

01:10 Notice that i'm moving that coefficient in front to indicate that this two is showing we have two silvers as well as two nitrates.

01:22 Going on to the sodium, we have two of those sodiums.

01:26 The two comes out front as well.

01:28 Well to show that both of those sodiums dissociated.

01:32 Another way that we could show this is one sodium dissociates and another sodium dissociates.

01:40 And the chromate right afterwards is going to stay together as a package.

01:50 This is because it is a polyatomic ion.

01:54 At the other side here, since this silver chromate here is a solid.

02:00 It is not going to dissociate.

02:02 This is going to be the important piece of the reaction.

02:05 This is the precipitate that forms.

02:07 We get silver and chromate.

02:13 And that's solid.

02:15 Then we get our two sodiums again and our two nitrates.

02:22 And now we go through and cancel out the spectator species...

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