Difference between revisions of "ChemCollective-Virtual-Labs/C2/Density-of-Solids-and-Liquids/English"

Latest revision as of 13:20, 4 June 2018

Visual Cue

Narration

Slide Number 1

Title Slide

Welcome to this tutorial on Density of Metals and Liquids using Vlabs.

Slide Number 2

Learning Objectives

In this tutorial, we will learn to determine,

Densities of Metals and liquids.

Slide Number 3

Pre-requisites

www.spoken-tutorial.org

To follow this tutorial you should be familiar with,

ChemCollective Vlabs interface.

If not, for relevant tutorials please visit our website.

Slide Number 4

System Requirement

Here I am using,

Mac OS version 10.10.5

ChemCollective Vlabs version 2.1.0

Java version 8.

Cursor on the window.

Here I have opened a Vlabs window.

Click on File->Load homework option.

Click on File menu and select Load homework option.

Select Molarity and Density from the list.

Click on Metal density problem from the drop down menu

Double-click on Metals Density Problem from the sub-menu.

Go to Problem description in the Stockroom explorer.

Point to problem.

Pause the video to read the problem and then resume again.

Point to problem.

Silver-10.5,

Rhodium-12.4 and

Platinum- 21.45 grams per cubic centimeter.

Problem states that you have 3 unlabeled bottles with metallic powder.

You need to identify the metals in the bottles.

The metal densities are given in the problem description.

We will use Archimedes' Principle to find the densities of metals.

Slide Number 5

Archimedes Principle

An object when immersed in water will displace water.

The displaced water will be equal to its volume.

Slide Number 6

Archimedes Principle

Different metals have different densities.

Hence, different metals of the same weight have different volumes.

A metal that is less dense will displace more water than a denser one.

Click on Workbench

Switch to Workbench

Cursor on the stockroom explorer.

Double Click on Metal 1, Metal 2, Metal 3 to add them to the Workbench.

Double click on water icon.

Go to Click to select new glassware from the drop down menu

Select Graduated Cylinders.

A sub menu appears.

Click on 25ml Graduated Cylinder.

Click on Glassware icon.

Select Graduated Cylinders.

From the sub-menu select 25 ml Graduated Cylinder.

Right-click on Graduated Cylinder.

Context menu opens.

We need three 25 ml Graduated Cylinders for this experiment.

Right-click on Graduated Cylinder.

Context menu opens.

Using Duplicate option make 2 copies of the Graduated Cylinder.

Click and hold the left mouse button.

Drag over the cylinders to select.

Click on any cylinder >> drag to the convenient position.

Drag and bring the Graduated Cylinders to the centre of the Workbench.

Right-click on Graduated Cylinder.

From the Context-menu select Rename option.

Text box opens, type 1 in the text box and click Ok button.

Label the Cylinders as 1, 2 and 3.

Drag graduated cylinder 1 to the Distilled water tank.

Point to the red warning icon.

Let us drag graduated cylinder 1 to the water tank.

Notice that a red warning icon appears.

This indicates that procedure is incorrect.

Place graduated cylinder 1 aside.

The correct procedure is to drag water on to the graduated cylinder.

Tools>>Transfer bar>>Precise transfer.

Change the transfer mode to Precise Transfer using Tools menu.

Type 10 in the Transfer amount input bar>> click on pour.

Point to the graduated cylinder.

Type 10 in the Transfer amount input bar.

Click on pour.

10 ml of water is transferred into the graduated cylinder 1.

Type 10 in the Transfer amount input bar >> click on pour.

Likewise transfer 10ml of water into graduated cylinders 2 and 3.

Drag the water tank to a different place on the Workbench

Move the water tank to a different place on the Workbench.

Click on Select Tools menu, from the list, select Scale.

Drag the Scale to a convenient position on the Workbench.

Click on Select Tools menu >>from the list select Weighing Boat.

Again click on Select Tools menu, from the list select Weighing Boat.

Right-click on Weighing Boat.

Context menu opens.

Using copy and paste option make 2 copies of the Weighing Boat.

We need three Weighing Boats for this experiment.

We can also use short-cut keys, to copy and paste.

Click on Weighing Boat.

Use Ctrl-C to copy and Ctrl-V to paste.

Click and hold the left mouse button.

Drag over the weighing boats to select.

Click on any weighing boat >> drag to the convenient position.

Drag and bring the weighing boats to the centre of the Workbench

Right-click on Weighing Boat.

From the Context-menu select Rename option.

Text box opens, type 1 in the text box and click Ok button.

Label the Weighing Boats as 1, 2 and 3.

Place weighing boat 1 over the scale.

Click on TARE button on the scale.

Drag the Metal 1 over the weighing boat.

Drag Metal 1 over to weighing boat 1.

Type 50 in the Transfer Amount(g) input bar.

Click on Pour.

Drag the bottle.

Type 50 in the Transfer Amount(g) input bar

Click on Pour.

Place the bottle aside.

Cursor on the weighing boat.

Drag the weighing boat 1 over the graduated cylinder 1.

Remove the weighing boat from the scale.

Place weighing boat 1 over the graduated cylinder 1.

Type 50 in the Transfer amount input bar below.

Click on Pour.

Type 50 in the Transfer Amount input bar .

Click on Pour.

Point to graduated cylinder.

Drag weighing boat 1 aside.

Observe the level of water in the graduated cylinder.

It has risen by 5 ml.

Keep the weighing boat 1 aside.

Place weighing boat 2 over the scale.

Click on TARE button on the scale.

Now, Place weighing boat 2 on the scale.

Click on TARE button on the scale.

Drag Metal 2 over the weighing boat.

Drag Metal 2 over weighing boat 2.

Type 50 in the Transfer Amount(g) input bar

Click on Pour.

Drag the bottle.

Type 50 in the Transfer Amount(g) input bar.

Click on Pour.

Place the bottle aside.

Click on the weighing boat and drag.

Place weighing boat 2 over the graduated cylinder 2.

Remove the weighing boat 2 from the scale.

Place weighing boat 2 over the graduated cylinder 2.

Type 50 in the Transfer Amount(g) input bar.

Click on Pour.

Type 50 in the Transfer Amount(g)input bar.

Click on Pour.

Point to graduated cylinder 2.

Keep the weighing boat 2 aside.

Observe that the water level in the cylinder has risen by 4 ml.

Keep the weighing boat 2 aside.

Place weighing boat 3 over the graduated cylinder 3.

Similarly, weigh 50 grams of metal 3 using weighing boat 3.

Place weighing boat 3 over the graduated cylinder.

Type 50 in the Transfer Amount(g) input bar.

Click on Pour.

Type 50 in the Transfer Amount(g) input bar.

Click on Pour.

Point to graduated cylinder 3.

Keep the weighing boat 3 aside.

Water level in the cylinder has risen by 2.5 ml.

Keep the weighing boat 3 aside.

Slide Number 7

Results

Calculate the densities using the formula:

Density= mass/volume.

Solid	Mass (m)	Volume (V) = V2-V1	Density= m/V	Given Density	Metal
Metal 1	50 g	15-10=5	50/5=10	10.5	Silver
Metal 2	50 g	14-10=4	50/4=12.25	12.4	Rhodium
Metal 3	50 g	12.5-10=2.5	50/2.5=20	21.45	Platinum

This slide shows the density calculations for the metals.

Calculate the densities using the formula:

Density= mass/volume.

Experimental density of Metal 1 is 10 which corresponds to Silver.

Metal 2 is 12.2 which corresponds to Rhodium.

Metal 3 is 20 which corresponds to Platinum.

Slide Number 8

Assignment

Repeat the above experiment with different metal weights (30 g and 40 g).

Tabulate and analyse your results.

Cursor on the Workbench

Lets proceed to the liquid density problem.

Click on File->New workbench option.

Let us add a new workbench.

Click on File and select New workbench option.

Click on the workbench.

Go to File->Load homework option

Go to File menu and select Load homework option.

Select Molarity and Density from the list.

Click on Liquid density problem.

Double-click on Liquid density problem.

Click on problem description in the stockroom explorer.

Double-click on problem description in the stockroom explorer.

Point to problem.

Pause the video to read the problem statement.

Resume after reading.

Cursor on the problem description.

The problem states that there are two compounds of A-1 and A-2.

One of the liquids is a preservative, other liquid is not a preservative.

The preservative has higher density.

Our aim is to find the liquid containing Preservative.

For this we need to measure densities of A-1 and A-2.

Click on Workbench

Switch back to Workbench

Click on the two compounds A-1 and A-2 to add to it to work bench

Double-click on compounds A-1 and A-2 to add them to Workbench.

Go to Click to select new glassware from the drop down menu.

Select Volumetrics.

A sub menu appears.

Click on 100ml volumetric flask.

Obtain a 100ml volumetric flask from the glassware option.

Right-click on Volumetric flask.

From the Context-menu select Duplicate option.

We need two 100ml volumetric flasks for this experiment.

We can make a copy using Duplicate option.

Drag and bring the flasks to the centre of the workbench.

Drag and bring the flasks to the center of the workbench.

Select Volumetric flask.

Press F2 .

Enter A-1 in the text box

Click on OK.

Similarly press F2 to rename other flask as A-2.

Label the flasks as A-1 and A-2.

We can rename by pressing F2.

Click on Click to select tools from the drop down menu.

Select Scale and add it to the Workbench

Click on Select tools icon.

Select Scale and add it to the Workbench.

Place one 100ml volumetric flask on the scale >> click on TARE button.

Place the volumetric flask A-1 on the scale.

click on TARE button.

Transfer 100ml of Compound A1 to the 100ml volumetric flask by Precise Transfer mode

Transfer 100ml of Compound A1 to flask A-1 by Precise Transfer mode.

Point to scale.

Place the flask A-1 aside.

Remove Volumetric flask from the scale.

Note the mass from the scale.

Scale reads 126 g.

Note this value.

Place the flask A-1 aside.

Remove Volumetric flask from the scale.

Place flask A-2 on the scale, click on TARA button.

Transfer 100ml of Compound A1 to flask A by Precise transfer mode.

Next place flask A-2 on the scale, click on TARE.

Pour 100 ml of Compound A-2.

Scale reads 85 g.

Note this value.

Slide number 9

Results

Calculate densities using the formula:

Density=mass/volume

Experimental results are tabulated on this slide.

Calculate densities using the formula:

Density=mass/volume

Observe that density of Compound A-1 is more than Compound A-2.

Therefore Compound A-1 contains the preservative.

Slide Number 10

Summary

Let's summarize.

In this tutorial we have learnt to measure,

Densities of silver, rhodium and platinum using Archimedes' Principle.

Densities of liquids with unknown concentration.

Slide Number 11

Assignment

For the assignment.

Open default lab setup window.

You will find many stock solutions.

Find density for a few solutions of your choice.

Slide Number 12:

About Spoken Tutorial project

The video at the following link summarizes the Spoken Tutorial project.

Please download and watch it.

Slide Number 13:

Spoken Tutorial workshops

The Spoken Tutorial Project team:

conducts workshops using spoken tutorials and

gives certificates on passing online tests.

For more details, please write to us.

Slide Number 14:

Forum for specific questions:

Do you have questions in THIS Spoken Tutorial?

Please visit this site

Choose the minute and second where you have the question

Explain your question briefly

Someone from our team will answer them

Please post your timed queries in this forum.

Slide Number 15:

Acknowledgement

Spoken Tutorial Project is funded by NMEICT, MHRD, Government of India.

More information on this mission is available at this link.

This tutorial is contributed by Snehalatha Kaliappan and Madhuri Ganapathi from IIT-Bombay.

Thank you for joining

Contributors and Content Editors

Madhurig, Snehalathak

Difference between revisions of "ChemCollective-Virtual-Labs/C2/Density-of-Solids-and-Liquids/English"

Latest revision as of 13:20, 4 June 2018

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@@ Line 33: / Line 33: @@
 '''System Requirement'''
-|| Here I am using
+|| Here I am using,
 Mac OS version 10.10.5
@@ Line 57: / Line 57: @@
 |-
-|| Go to '''problem description''' in the '''stockroom explorer.'''
+|| Go to '''Problem description''' in the '''Stockroom explorer.'''
-|| Go to '''problem description''' in the '''stockroom explorer.'''
+|| Go to '''Problem description''' in the '''Stockroom explorer.'''
 |-
@@ Line 127: / Line 127: @@
-From the sub-menu select '''25ml Graduated Cylinder.'''
+From the sub-menu select '''25 ml Graduated Cylinder.'''
 |-
@@ Line 134: / Line 134: @@
 '''Context menu opens.'''
-|| We need three 25ml ''' Graduated Cylinders''' for this experiment.
+|| We need three 25 ml ''' Graduated Cylinders''' for this experiment.
@@ Line 152: / Line 152: @@
 Click on any cylinder >> drag to the convenient position.
-|| Drag and bring the '''Graduated Cylinders '''to the center of the '''Workbench'''.
+|| Drag and bring the '''Graduated Cylinders ''' to the centre of the '''Workbench'''.
 |-
@@ Line 242: / Line 242: @@
 Click on any weighing boat >> drag to the convenient position.
-|| Drag and bring the '''weighing boats '''to the center of the '''Workbench'''
+|| Drag and bring the '''weighing boats ''' to the centre of the '''Workbench'''
 |-
@@ Line 258: / Line 258: @@
 || Place '''weighing boat 1''' over the '''scale'''.
-Click on '''Tare''' button on the scale.
+Click on '''TARE''' button on the scale.
 |-
@@ Line 266: / Line 266: @@
 |-
-|| Type '''50''' in the '''Transfer Amount(g)''' text bar.
+|| Type '''50''' in the '''Transfer Amount(g)''' input bar.
 Click on '''Pour'''.
@@ Line 274: / Line 274: @@
 || Type 50 in the '''Transfer Amount(g)''' input bar
-Click on''' Pour. '''
+Click on ''' Pour. '''
 Place the bottle aside.
@@ Line 302: / Line 302: @@
 Drag''' weighing boat 1 '''aside.
-|| Observe the level of water in the cylinder.
+|| Observe the level of water in the graduated cylinder.
 It has risen by 5 ml.
@@ Line 342: / Line 342: @@
 Place '''weighing boat 2''' over the '''graduated cylinder 2.'''
-|| Remove the '''weighing boat 2''' from the''' scale.'''
+|| Remove the '''weighing boat 2''' from the ''' scale.'''
@@ Line 361: / Line 361: @@
-Keep the '''weighing boat 1''' aside.
+Keep the '''weighing boat 2''' aside.
 || Observe that the water level in the cylinder has risen by 4 ml.
-Keep the '''weighing boat 1''' aside.
+Keep the '''weighing boat 2''' aside.
 |-
@@ Line 389: / Line 389: @@
-Keep the '''weighing boat 1''' aside.
+Keep the '''weighing boat 3''' aside.
 || Water level in the cylinder has risen by 2.5 ml.
-Keep the '''weighing boat 1''' aside.
+Keep the '''weighing boat 3''' aside.
 |-
@@ Line 404: / Line 404: @@
 Density= mass/volume.
 {| style="border-spacing:0;"
 | style="border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Solid
 | style="border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Mass (m)
-| style="border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Volume (V) <nowiki>= V2-V1</nowiki>
+| style="border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Volume
+(V) <nowiki>= V2-V1</nowiki>
 | style="border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Density<nowiki>= m/V</nowiki>
 | style="border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Given Density
@@ Line 417: / Line 420: @@
 | style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| 50 g
 | style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| 15-10<nowiki>=5</nowiki>
 | style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| 50/5='''10'''
 | style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| '''10.5'''
@@ Line 428: / Line 434: @@
 | style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| '''12.4 '''
 | style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Rhodium
+|-
+| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Metal 3
+| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| 50 g
+| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| 12.5-10=2.5
+| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| 50/2.5='''20'''
+| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| '''21.45'''
+| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Platinum
 |}
 || This slide shows the density calculations for the metals.
@@ Line 531: / Line 546: @@
 We can make a copy using '''Duplicate''' option.
 |-
-|| Drag and bring the flasks to the center of the workbench.
+|| Drag and bring the flasks to the centre of the workbench.
 || Drag and bring the flasks to the center of the workbench.
@@ Line 544: / Line 559: @@
 Similarly press '''F2'''  to rename other flask as '''A-2'''.
-|| Label the flasks '''A-1''' and '''A-2'''.
+|| Label the flasks as '''A-1''' and '''A-2'''.
 We can rename by pressing '''F2'''.
@@ Line 558: / Line 573: @@
 |-
 || Place one 100ml '''volumetric flask''' on the '''scale''' >> click on '''TARE ''' button.
-|| Place the '''volumetric flask A-1 '''on the scale.
+|| Place the '''volumetric flask A-1 ''' on the scale.
 click on '''TARE''' button.
 |-
-|| Transfer 100ml of '''Compound A1''' to the 100ml volumetric flask by '''Trecise Transfer mode'''
+|| Transfer 100ml of '''Compound A1''' to the 100ml volumetric flask by '''Precise Transfer mode'''
 || Transfer 100ml of '''Compound A1''' to '''flask A-1 '''by '''Precise Transfer mode.'''
@@ Line 605: / Line 620: @@
 Density=mass/volume
-{| style="border-spacing:0;"
-| style="border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Liquid
-| style="border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Mass (m)
-| style="border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Volume (V)
-| style="border:0.05pt solid #000000;padding:0.097cm;"| Density=m/v
-|-
-| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| A-1
-| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| 126.0 g
-| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| 100 mL
-| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| 126/100=1.26 g/mL
-|-
-| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| A-2
-| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| 85.0 g
-| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| 100 mL
-| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| 85/100=0.85 g/mL
-|}
 || Experimental results are tabulated on this slide.
@@ Line 644: / Line 638: @@
 '''Summary '''
-| | Let's summarize.
+|| Let's summarize.
@@ Line 681: / Line 675: @@
 || The '''Spoken Tutorial Project '''team:
-<nowiki>* </nowiki>conducts workshops using spoken tutorials and
+conducts workshops using spoken tutorials and
-* <nowiki>* gives certificates on passing online tests.</nowiki>
+gives certificates on passing online tests.
 For more details, please write to us.
@@ Line 695: / Line 689: @@
 Do you have questions in THIS Spoken Tutorial?
-* Please visit this site
+Please visit this site
-* Choose the minute and second where you have the question
-* Explain your question briefly
+Choose the minute and second where you have the question
-* Someone from our team will answer them
+Explain your question briefly
+Someone from our team will answer them
 || Please post your timed queries in this forum.
@@ Line 706: / Line 701: @@
 || '''Slide Number 15:'''
-'''Acknowledgemen'''t
+'''Acknowledgement'''
 || Spoken Tutorial Project is funded by NMEICT, MHRD, Government of India.