All 4 labs are due on Friday, February 27, at the beginning of class and online at 11:59pm on Friday evening. Each lab will be a separate document but will be turned in as one packet. Each lab should contain the title and the purpose as listed in the lab instructions. The next section should be either the Data or Conclusion, depending on what is required. You will also need to include a works cited section and be sure to cite any sources you use in addition to the lab instructions.
I HIGHLY encourage you to look at the IB rubric BEFORE you write the report. Please pay careful attention to what you are being graded on.
Info for citation: (refer to handbook or online for proper format)
Title- Virtual Chem Lab CD-ROM
developed by Brigham Young University for use with Prentice Hall Chemistry
software developers- Brian F. Woodfield, Matthew C. Asplund
record sheet writer- Steven Haderlie
publisher- Prentice Hall
Year- 2005
Saturday, February 21, 2009
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26 comments:
For Lab 26, since it has two parts, how should we structure the data?
Should we have Part One raw and processed data and then part two raw and processed data?
Or should we have one raw data section for part one and part two, and then a processed data section for both part one and part two?
thanks =)
You can organize it in one of two ways:
1- have part 1: raw data
processed data
part 2: raw data
processed data
2- have raw data: part 1
part 2
processed data: part 1
part 2
For calculating percent error, it says to use the formula (highest answer - lowest answer)/average x 100.
Could you specify what they mean by the "answer"? Do we use the mass, or the titrant dispensed? or something else?
Refer to the purpose. What are you calculating? That is your "answer".
Does that mean we have to have more than 1 answer? I averaged my trials before I calculated my answer, so I only ended up with 1 answer.
In that case, you can compare your answer to the actual answer given in one of the previous labs in the packet and use the normal percent error formula.
|error|/actual value
I used the given answer 0.3060M as the accepted value for 26a, but there's nothing i can compare to for 26b
What is the molarity of HCl in lab 28?
0.3015M HCl
thanks. did anyone figure out what we use to get the experimental error for lab 26?
how about that lab 30 with the molarity of MnO4 :)
0.0815 M KMnO4
Did anyone findout the actual molarity of HAc to use for finding the percent error in part 2 of lab 26?
For the lab packet, what do we cite? I thought it was Vanderbrink, but the packet says Pearson Prentice Hall on it..
does anyone know how to standarize NaOH?
"I used the given answer 0.3060M as the accepted value for 26a, but there's nothing i can compare to for 26b"
--> compare the trials against themselves. See Lab 29 for formula.
"For the lab packet, what do we cite? I thought it was Vanderbrink, but the packet says Pearson Prentice Hall on it.."
--please see the original blog entry for the information on the citation.
How do you cite the CD?.......... the place of publication is not given.... or am I doing it wrong?
I think it is....
"Title of lab." Virtual Chem Lab(underlined). CD-ROM. 2005 ed. PLACE OF PUBLICATION?? : Publisher??, 2005
unsure of place of publication and publisher!!
How do you cite the CD?.......... the place of publication is not given.... or am I doing it wrong?
I think it is....
"Title of lab." Virtual Chem Lab(underlined). CD-ROM. 2005 ed. PLACE OF PUBLICATION?? : Publisher??, 2005
unsure of place of publication and publisher!!
Title is listed in original posting, please see that.
Publisher: Pearson Education, Prentice Hall
Location: Boston, MA
For lab 30, it says the molecular weight of FeCl2 is 151.91g/mol. Is this right? Isnt it suppose to be around 126.75?
It is not a pure compound, that's why it is an unknown. If it was pure FeCl2, there would be no experiment because the percent compostion would be 100%.
last question
For lab 28, do we not include the percent error in the conclusion? There's no accepted value to compare to, and it never asked told us to repeat the experiment, so I don't see how we can find a percent error.
How do we cite the lab? Who is the author???
santa:
yes i asked her and she said we dont include a percent error. we just justify our results.
Aaron:
this is what i got for my reference, you can use it as a reference for your reference if you want:
"Virtual Chem Lab CD-ROM." Virtual Chem Lab. CD-ROM. 2005 ed. Boston, MA: Pearson Education, Prentice Hall, 2005
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