Spec20 - Revision history

Mjeppesen at 18:47, 27 March 2024

2024-03-27T18:47:54Z

← Older revision		Revision as of 18:47, 27 March 2024
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	5. Inform the students to take the data sheets to the computer station.		5. Inform the students to take the data sheets to the computer station.

	[[Category:~~Maxey~~ Demos]]		[[Category:Demos]]

Wiki Administrator at 06:10, 11 May 2013

2013-05-11T06:10:56Z

← Older revision		Revision as of 06:10, 11 May 2013
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	==Purpose==		==Purpose==

	To find an unknown concentration of a solution by plotting known concentration of the same solution vs absorbance.		To find an unknown concentration of a solution by plotting known concentration of the same solution vs absorbance. A handout for the students is available here: [[File:Maxie_-_Spec20_Station_Handout.docx]].

Bozhang: /* Experiment */

2012-12-22T01:10:43Z

Experiment

← Older revision		Revision as of 01:10, 22 December 2012
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	5. Inform the students to take the data sheets to the computer station .		5. Inform the students to take the data sheets to the computer station.

	[[Category:Maxey Demos]]		[[Category:Maxey Demos]]

Bozhang at 04:15, 3 October 2012

2012-10-03T04:15:22Z

← Older revision		Revision as of 04:15, 3 October 2012
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	== ~~Spec20~~ ==		==Purpose==

			To find an unknown concentration of a solution by plotting known concentration of the same solution vs absorbance.

	~~===Purpose===~~

	~~To find an unknown concentration of a solution by plotting known concentation of the same solution vs asorbance.~~		==Experiment==

			0. Preparation: Make sure the spectrometer wavelength is set to 590 nm. The instructions to calibrate the spectrometer is labeled on the front of each Spec20. Prepare six test tubes with percents ranging from 0% to 100% of blue dyes. Test tube 1 is water only it is to be used as the blank. Also every student should have one test tube labeled unknown.

	~~===Experiment===~~

	1. ~~Make sure~~ the ~~spectrometer wavelength is set~~ to ~~590. The instructions to calibrate the spectrometer is labeled~~ on ~~the front~~ of ~~each Spec20.Prepare six test tubes~~ with ~~percents ranging from 0% to 100%~~ of ~~blue dyes. Test tube 1 is water only it is to be used as the blank,also every student should have~~ one ~~test tube labeled unknown~~.		1. Ask the students to draw two columns on a sheet of paper with PERCENT on top of column one and DATA on top of column two.

	~~Ask the kids to draw two columns on a sheet of paper with PERCENT on top of column one and DATA on top of column two.~~

	2. Ask the ~~kids~~ to put test tube number 1(BLANK) into spec20. Check each station to make sure the absorbance reading is ~~approximlly~~ is zero.		2. Ask the students to put test tube number 1(BLANK) into spec20. Check each station to make sure the absorbance reading is approximately is zero.

	3. Ask the kids to put test tube from number 2 to number 5 while reading off the reading corresponding percents 20%, 50%, 80% and 100% and tell them to record it in the PERCENT column as well as record the absorbance in the DATA column.

	4. Ask the ~~kids~~ to put ~~the last~~ test tube ~~labeled "ev"(UNKNOWN)~~ ~~into the Spec20. Write down the asorbance~~ reading in the ~~data~~ column ~~and mark it~~ as ~~"x"~~ in the ~~percent~~ column.		3. Ask the students to put test tube from number 2 to number 5 while reading off the reading corresponding percents 20%, 50%, 80% and 100% and tell them to record it in the PERCENT column as well as record the absorbance in the DATA column.

	5.Inform the students to take the data sheets to the computer station .
			4. Ask the students to put the last test tube labeled "ev"(UNKNOWN) into the Spec20. Write down the absorbance reading in the data column and mark it as "x" in the percent column.


			5. Inform the students to take the data sheets to the computer station .

	[[Category:Maxey Demos]]		[[Category:Maxey Demos]]

Bozhang: Created page with "== Spec20 == ===Purpose=== To find an unknown concentration of a solution by plotting known concentation of the same solution vs asorbance. ===Experiment=== 1. Make sure..."

2012-08-14T04:29:39Z

Created page with "== Spec20 == ===Purpose=== To find an unknown concentration of a solution by plotting known concentation of the same solution vs asorbance. ===Experiment=== 1. Make sure..."

New page

== Spec20 ==

===Purpose===

To find an unknown concentration of a solution by plotting known concentation of the same solution vs asorbance.

===Experiment===

1. Make sure the spectrometer wavelength is set to 590. The instructions to calibrate the spectrometer is labeled on the front of each Spec20.Prepare six test tubes with percents ranging from 0% to 100% of blue dyes. Test tube 1 is water only it is to be used as the blank,also every student should have one test tube labeled unknown.

Ask the kids to draw two columns on a sheet of paper with PERCENT on top of column one and DATA on top of column two.

2. Ask the kids to put test tube number 1(BLANK) into spec20. Check each station to make sure the absorbance reading is approximlly is zero.

3. Ask the kids to put test tube from number 2 to number 5 while reading off the reading corresponding percents 20%, 50%, 80% and 100% and tell them to record it in the PERCENT column as well as record the absorbance in the DATA column.

4. Ask the kids to put the last test tube labeled "ev"(UNKNOWN) into the Spec20. Write down the asorbance reading in the data column and mark it as "x" in the percent column.

5.Inform the students to take the data sheets to the computer station .

[[Category:Maxey Demos]]