PoojaMoolya at 10:35, 30 January 2019

2019-01-30T10:35:44Z

PoojaMoolya: Created page with "{| border =1 ||'''Time''' ||''' Narration''' |- || 00:01 || Welcome to this spoken tutorial on '''Metal Displacement Reactions''' using '''Vlabs'''. |- || 00:07 || In..."

2019-01-30T10:34:30Z

Created page with "{| border =1 ||'''Time''' ||''' Narration''' |- || 00:01 || Welcome to this spoken tutorial on '''Metal Displacement Reactions''' using '''Vlabs'''. |- || 00:07 || In..."

New page

{| border =1
||'''Time'''
||''' Narration'''

|-
|| 00:01
|| Welcome to this spoken tutorial on '''Metal Displacement Reactions''' using '''Vlabs'''.

|-
|| 00:07
|| In this tutorial we will learn to, Carry out displacement reactions of,

Magnesium

Zinc

Lead

Copper and

Silver

|-
||00:20
|| Arrange metals in decreasing order of reactivity.

|-
||00:24
|| To follow this tutorial you should be familiar with, '''ChemCollective Vlabs''' interface.

|-
||00:31
|| If not for relevant tutorials, please visit our website.

|-
|| 00:37
|| Here I am using

Mac OS version 10.10.5

ChemCollective Vlabs version 2.1.0

Java version 8.

|-
||00:51
|| Here I have opened''' Virtual Chemistry Labs''' application window.

'''Default lab setup''' window opens.

|-
|| 01:01
|| Click on '''File''' menu and select '''Load Homework''' option.

|-
||01:06
|| '''Default Lab Setup''' dialog box opens.

|-
||01:10
|| Double-Click on '''Redox''' Folder.

Then double-Click on '''Redox Reaction Series'''.

|-
|| 01:18
|| Click on '''Problem Description''' in the '''Stockroom Explorer.'''

|-
|| 01:23
|| The problem states that, Perform metal displacement reactions.

|-
||01:29
|| Arrange the given metals from strongest to weakest reducing agent.

|-
||01:35
|| '''Stockroom Explorer''' is provided with all the required metals and their salt solutions.

|-
|| 01:43
|| Let us define '''Redox Reactions'''.

An '''oxidation-reduction (redox)''' reaction, involves transfer of electrons between two species.

|-
||01:54
|| '''Oxidation''' is loss of electrons by any species.

'''Reduction '''is gain of electrons by any species.

|-
|| 02:04
|| '''Metal displacement''' reactions are a type of Redox reactions.

|-
||02:09
|| In '''metal displacement''' reactions, a more reactive metal displaces a less reactive metal in a metal salt solution.

|-
|| 02:19
|| This slide shows the '''activity series '''of some metals used in '''displacement reactions'''.

|-
||02:27
|| Here is an example of metal''' displacement reaction.'''

|-
||02:32
|| '''Silver''' ions in '''silver nitrate''' can be replaced by '''copper''' to form '''copper nitrate'''.

|-
||02:39
|| Elemental '''silver''' is precipitated in the reaction.

'''Silver''' has lower '''oxidation potential''' than copper. It cannot replace '''copper''' from '''copper nitrate.'''

|-
|| 02:54
|| Switch to application window

Click on '''Workbench1'''.

|-
||03:00
|| Right-click on the '''workbench''' tab to rename.

Type name as '''Magnesium-rxn''' (Magnesium reaction).

|-
|| 03:08
|| Let us now demonstrate the reactivity of '''Magnesium''' metal.

|-
||03:13
|| From the '''Stockroom Explorer,''' click on '''Solids''' cabinet, double-click on ''' Magnesium'''.

|-
||03:21
|| Click on '''Solutions''' cabinet, double-click on,

'''0.1 M Copper nitrate'''

'''0.1 M Zinc Nitrate'''

'''0.1 M Lead Nitrate'''

'''0.2 M Silver Nitrate'''.

|-
||03:37
|| Close the '''cabinets'''.

|-
|| 03:40
|| Click on '''Glassware''' menu, and select '''250 mL Erlenmeyer flask'''

|-
||03:46
|| We need 4 flasks for this experiment.

Make duplicates of the '''Erlenmeyer flask'''.

|-
|| 03:55
|| Rename the flasks with corresponding metal symbols, '''Zinc, Lead , Silver''' and '''Copper'''.

|-
||04:06
|| Arrange the apparatus and chemicals.

Click on any one of the bottles containing solution.

|-
||04:14
|| The '''Solution Info panel''' shows the bottle contains 50 ml of solution.

|-
|| 04:21
|| Pour the contents of the bottles into respective flasks using '''Precise transfer''' mode.

|-
||04:28
|| Type 50 in the '''Transfer amount input bar'''.

Click on '''Pour'''.

|-
||04:35
|| Similarly transfer contents of the bottles into flasks.

|-
|| 04:44
|| Keep the empty bottles aside.

|-
|| 04:48
|| Click on each '''Erlenmeyer flask''' and note the concentration of the metal ions.

|-
|| 04:57
|| Pour 1 gram of solid '''Magnesium''' metal in each flask using '''Precise transfer''' mode.

|-
|| 05:11
|| Click on the flask containing '''copper nitrate''' .

Observe that green color of the solution has disappeared.

|-
||05:20
|| Temperature increases on addition, then decreases.

The reaction is '''Exothermic'''.

|-
||05:28
|| In the '''Solution Info Panel''', concentration of '''copper ions''' is zero.

|-
||05:34
|| '''Magnesium''' ions are observed in the solution.

This means that '''Magnesium''' has displaced '''copper ions''' from the solution.

|-
|| 05:44
|| Click on '''Solid''' radio button.

Observe that metallic '''copper''' is now deposited in the solution.

|-
||05:52
|| This is because '''Magnesium''' has higher '''oxidation potential ''' than '''copper'''.

|-
|| 05:58
|| Click on the flask containing '''Zinc nitrate'''.

|-
||06:02
|| Click on '''Aqueous''' radio button on the '''Solution Info Panel'''.

Concentration of '''Zinc''' ions is zero.

|-
||06:11
|| '''Magnesium''' ions are now observed.

Click on '''Solid''' radio button.

|-
||06:18
|| Observe that '''Zinc''' is now found in the solution.

|-
||06:22
|| '''Magnesium''' has replaced '''Zinc''' ions from its solution.

|-
||06:27
|| Click on the flask containing '''lead nitrate'''.

Observe '''Solution Info panel'''.

|-
||06:35
|| '''Magnesium''' has replaced '''Lead''' ions from its solution.

|-
||06:45
|| Click on the flask containing '''silver nitrate'''.

Observe '''Solution Info panel'''.

|-
||06:51
|| '''Magnesium''' has replaced '''Silver''' ions from its solution.

|-
||06:59
||Now let us demonstrate the activity of '''Zinc'''.

Click on '''File''' menu and select '''New Workbench'''.

|-
||07:08
|| Rename the workbench as '''Zinc-reaction'''.

|-
|| 07:12
|| From '''Solids '''cabinet select '''Zinc'''.

|-
||07:16
|| Click on '''Solutions cabinet''' and select

'''0.1 M Copper Nitrate'''

'''0.1 M Magnesium Nitrate'''

'''0.1 M Lead Nitrate'''

'''0.2 M Silver Nitrate'''

|-
||07:30
|| Close the '''cabinets'''.

|-
|| 07:33
|| As we did in the previous experiment, take 4 '''Erlenmeyer flasks'''.

|-
||07:39
|| Rename the flasks with corresponding metal symbols '''Magnesium, Lead, Copper''' and '''Silver'''.

Arrange the apparatus.

|-
||07:53
|| Pour the contents of the bottles into the respective flasks.

Type 50 in the '''Transfer amount input bar'''.

Click on '''Pour'''.

|-
|| 08:12
|| Pour 1 g of solid '''Zinc''' metal in each flask.

|-
||08:17
|| Type 1 in the '''Transfer amount input bar'''.

Click on '''Pour'''.

|-
|| 08:29
|| Click on the flask containing '''copper nitrate'''.

|-
||08:33
|| Observe that '''Copper''' is displaced by '''Zinc'''.

|-
||08:38
|| Click on the flask containing '''Magnesium nitrate.'''

|-
||08:42
|| '''Zinc '''cannot replace '''Magnesium''' from the solution.

Because '''Zinc''' has '''lower oxidation potential''' than '''Magnesium'''.

|-
||08:51
|| Hence, there is no reaction and '''Zinc''' remains in the solution.

|-
|| 08:57
|| Similarly click on flasks containing '''Lead nitrate''' and '''Silver nitrate'''.

Observe that '''Zinc''' displaces both '''Lead''' and '''Silver'''.

|-
|| 09:10
|| Similarly perform the experiments for '''Lead, Copper''' and '''Silver'''.

Open a different '''workbench''' for each metal displacement reaction.

|-
||09:23
|| Rename the workbenches as '''Lead-reaction, Copper-reaction''' and '''Silver-reaction'''.

|-
||09:31
|| Required metals and salt solutions are available in the '''Stockroom Explorer'''.

|-
|| 09:38
|| We have performed these experiments.

|-
||09:47
|| Here are the observations.

|-
||09:50
|| We have tabulated the results as shown.

'''Magnesium ''' has higher '''oxidation potential''' value.

|-
||09:58
|| '''Magnesium''' displaces metal ions, '''Zinc, lead, Copper''' and '''silver''' which have lower '''oxidation potentials'''.

|-
||10:09
|| '''Silver''' with lowest '''oxidation potential''' cannot displace,

'''Magnesium, zinc, lead or copper''' ions from solution.

|-
||10:19
|| The order of reactivity from strongest to weakest '''reducing agents''' is as follows.

|-
|| 10:27
|| Let us summarize

In this tutorial we have, Determined the order of reactivity for the following metals,

Magnesium

Zinc

Lead

Copper and

Silver.

|-
|| 10:41
|| As an assignment, Perform displacement reactions using solutions of metal halides.

|-
||10:49
|| Establish the order of reactivity of '''halogens'''.

|-
||10:53
|| The required chemicals are available in the '''Stockroom Explorer'''.

|-
|| 10:58
|| The video at the following link summarizes the Spoken Tutorial project.

Please download and watch it.

|-
||11:05
|| The '''Spoken Tutorial Project ''' team, conducts workshops using spoken tutorials and

gives certificates on passing online tests.

For more details, please write to us.

|-
||11:17
|| Please post your timed queries in this forum.

|-
|| 11:21
|| Spoken Tutorial Project is funded by NMEICT, MHRD, Government of India.

More information on this mission is available at this link.

|-
|| 11:32
|| This tutorial is contributed by Snehalatha Kaliappan and Madhuri Ganapathi from IIT-Bombay. Thank you for joining.

|}

@@ Line 11: / Line 11: @@
 || In this tutorial we will learn to, Carry out displacement reactions of,
-Magnesium
+Magnesium, Zinc, Lead, Copper and Silver
-−
 Zinc
-−
 Lead
-−
 Copper and
-−
 Silver
 |-
@@ Line 413: / Line 405: @@
 In this tutorial we have, Determined the order of reactivity for the following metals,
-Magnesium
+Magnesium, Zinc, Lead, Copper and Silver.
-−
 Zinc
-−
 Lead
-−
 Copper and
-−
 Silver.
 |-

ChemCollective-Virtual-Labs/C3/Metal-Displacement-Reactions/English-timed - Revision history

PoojaMoolya at 10:35, 30 January 2019

PoojaMoolya: Created page with "{| border =1 ||'''Time''' ||''' Narration''' |- || 00:01 || Welcome to this spoken tutorial on '''Metal Displacement Reactions''' using '''Vlabs'''. |- || 00:07 || In..."