chemisty labs 7-10 help
lab 7:
https://echo360.org/media/1cd1a3ee-4a4d-49b7-93e8-ba9df6c47210/public
Perform the calculations missing on the report sheet using the data I have provided. Do not use the data given in the videos.
Submit the lab as an attachment to this assignment as a Word document only.
Lab 8:
https://echo360.org/media/b1a728d7-33d7-43f7-8f09-77b77669a21b/public
Perform the calculations missing on the report sheet using the data I have provided. Do not use the data given in the videos.Submit the lab as an attachment to this assignment as a Word document only.
Lab 9:
https://echo360.org/media/8b530457-d386-4320-b174-ccf7a8117874/public
Perform the calculations missing on the report sheet using the data I have provided. Do not use the data given in the videos.Submit the lab as an attachment to this assignment as a Word document only.
No labs will be accepted late or by e-mail.
Lab 10:
https://echo360.org/media/9499cb7d-3f01-474d-96bc-ce9027ede9e1/public
Perform the calculations missing on the report sheet using the data I have provided. Do not use the data given in the videos. Name:
CH 111 – Introduction to Inorganic and Organic Chemistry
Exp. 341 – Synthesis of Strontium Iodate
INSTRUCTIONS
1.
2.
3.
4.
5.
Print out these instructions and the report sheet.
Read the Background/Introduction section of the lab manual and watch the intro video.
Watch the videos attached under the instructions.
Do the calculations. No graph is needed.
Submit both the report sheet and any supplementary questions as either a .doc or .pdf file and submit them as
an attached file under the lab assignment. No labs will be accepted by e-mail.
Report Sheet
Data, Results and Calculations
Trial
1
Volume of Sr(NO3)2 solution used, mL
Molarity of Sr(NO3)2 solution used, M
Volume of KIO3 solution used, mL
Molarity of KIO3 solution used, M
Mass of product formed
Number of moles of Sr(NO3)2 used
Number of moles of KIO3 used
Limiting reagent
Theoretical yield
Percent yield
Average percent yield
50
0.0045
40
0.125
0.084
Supplementary Questions
1.
What is the complete molecular equation for this reaction?
2. What is the net ionic equation for this experiment?
3. What are the spectator ions in this experiment?
2
40
0.0045
50
0.125
0.079
Name:
CH 111 – Introduction to Inorganic and Organic Chemistry
Exp 368 Heat of Neutralization
INSTRUCTIONS
1.
2.
3.
4.
5.
Print out these instructions and the report sheet.
Read the Background/Introduction section of the lab manual and watch the intro video.
Watch the videos attached under the instructions.
Do the calculations. No graph is needed.
Submit both the report sheet and any supplementary questions as either a .doc or .pdf file and submit them as
an attached file under the lab assignment. No labs will be accepted by e-mail.
Report Sheet
Data, Results and Calculations
Molarity of HCl: 2.015 M
Molarity of NaOH: 1.995 M
Trial
1
Volume of HCl
Molarity of HCl
2
25
25
2.015
25
25
1.995
20
21
22
24
32.5
31.5
Number of moles of HCl
Volume of NaOH
Molarity of NaOH
Number of moles of NaOH
Initial temperature of acid, oC
Initial temperature of base, oC
Average temperature of reactants, oC
Final temperature of mixture, oC
Temperature change, T
Q (heat transferred), J
Number of moles of HCl reacting
Hneut, kJ/mol
Average Hneut, kJ/mol
Supplementary Questions
1.
What is the net ionic equation for this experiment?
2. What difference would the use of sulfuric acid, a diprotic acid, have made in your calculations?
Name:
CH 111 – Introduction to Inorganic and Organic Chemistry
Exp. 428 – Calorie Content of a Peanut
INSTRUCTIONS
1.
2.
3.
4.
5.
Print out these instructions and the report sheet.
Read the Background/Introduction section of the lab manual and watch the intro video.
Watch the videos attached under the instructions.
Do the calculations. No graph is needed.
Submit both the report sheet and any supplementary questions as either a .doc or .pdf file and submit them as
an attached file under the lab assignment. No labs will be accepted by e-mail.
Report Sheet
Data, Results and Calculations
Trial
1
Initial mass of peanut, g
Mass of peanut residue, g
Mass of peanut burned
Final water temperature, oC
Initial water temperature, oC
Change in water temperature
Mass of water in calorimeter, kg
Total amount of energy released, cal
Amount of energy released per g of peanut burned
Average amount of energy released per grams of peanut burned
Accepted amount of energy released
Percent difference
0.902
0.114
0.596
0.028
40
21.3
33.5
21.1
0.200
0.200
Supplementary Questions
1.
What effect would using a tin can instead of an aluminum can have on the results?
2. What three places is the heat from the peanut lost to?
2
Name:
CH 111 – Introduction to Inorganic and Organic Chemistry
Exp. 478 – Titration of an Antacid
INSTRUCTIONS
1.
2.
3.
4.
5.
Print out these instructions and the report sheet.
Read the Background/Introduction section of the lab manual and watch the intro video.
Watch the videos attached under the instructions.
Do the calculations.
Submit both the report sheet and any supplementary questions as either a .doc or .pdf file and submit them as
an attached file under the lab assignment. No labs will be accepted by e-mail.
Report Sheet
Data, Results and Calculations
Molarity of HCl: 0.5895 M
Molarity of NaOH: 1.015 M
Cost of Antacid: $0.06 per tablet
Trial
1
Mass of tablet, g
Final buret reading, mL
Initial buret reading, mL
Volume of NaOH titrant, mL
Number of moles of HCl added
Number of moles of NaOH added
Number of moles of HCl neutralized per tablet
Average number of moles of HCl neutralized per tablet
Number of moles of HCl neutralized per gram of tablet
Average number of moles of HCl neutralized per tablet
Average number of moles HCl neutralized/g per tablet
Average number of moles of HCl neutralized/cost of tablet in cents
Supplementary Questions
None
0.356
23.6
0
2
0.332
43.5
23.6
