User:Samiye Yaman/Notebook/Lab 581/2013/02/08: Difference between revisions
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|style="background-color: #EEE"|[[Image:BDLlogo_notext_lr.png|128px]]<span style="font-size:22px;"> Experimental Chemistry</span> | |style="background-color: #EEE"|[[Image:BDLlogo_notext_lr.png|128px]]<span style="font-size:22px;"> Experimental Chemistry</span> | ||
|style="background-color: #F2F2F2" align="center"| | |style="background-color: #F2F2F2" align="center"|[[File:Report.png|frameless|link={{#sub:{{FULLPAGENAME}}|0|-11}}]][[{{#sub:{{FULLPAGENAME}}|0|-11}}|Main project page]]<br />{{#if:{{#lnpreventry:{{FULLPAGENAME}}}}|[[File:Resultset_previous.png|frameless|link={{#lnpreventry:{{FULLPAGENAME}}}}]][[{{#lnpreventry:{{FULLPAGENAME}}}}{{!}}Previous entry]] }}{{#if:{{#lnnextentry:{{FULLPAGENAME}}}}|[[{{#lnnextentry:{{FULLPAGENAME}}}}{{!}}Next entry]][[File:Resultset_next.png|frameless|link={{#lnnextentry:{{FULLPAGENAME}}}}]]}} | ||
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==Description== | ==Description== | ||
'''Part A: pH study''' | |||
''*HCl solutions with different pH were prepared( pH 1.5, 2.5 & 3.5) in order to mimic the pH of stomach. Each hydrogels were left in the solution until wednesday.'' | |||
*30 ml of water added to the beaker. 0.18 g of PVOH with R6G(MW:146,00)(prepared on 30/01/2013) placed in to the beaker. Drops of 1M of HCl were added to the beaker until pH was close to 1.5. (final pH=1.3) | |||
*30 ml of water added to the beaker. 0.16 g of PVOH with R6G(MW:146,00)(prepared on 30/01/2013) placed in to the beaker. Drops of 1M of HCl were added to the beaker until pH was close to 2.5. (final pH= 2.29) | |||
*30 ml of water added to the beaker. 0.18 g of PVOH with R6G(MW:146,00)(prepared on 30/01/2013) placed in to the beaker. Drops of 1M of HCl were added to the beaker until pH was close to 3.5. (final pH=3.3) | |||
*30 ml of water added to the beaker. 0.54 g of PVOH with R6G(MW:130,00)(prepared on 30/01/2013) placed in to the beaker. Drops of 1M of HCl were added to the beaker until pH was close to 1.5. | |||
*30 ml of water added to the beaker. 0.56 g of PVOH with R6G(MW:130,00)(prepared on 30/01/2013) placed in to the beaker. Drops of 1M of HCl were added to the beaker until pH was close to 2.5. | |||
*30 ml of water added to the beaker. 0.43 g of PVOH with R6G(MW:130,00)(prepared on 30/01/2013) placed in to the beaker. Drops of 1M of HCl were added to the beaker until pH was close to 3.5. | |||
*30 ml of water added to the beaker. 0.58 g of PVOH with R6G(MW:89,000-98,000)(prepared on 30/01/2013) placed in to the beaker. Drops of 1M of HCl were added to the beaker until pH was close to 1.5. | |||
*30 ml of water added to the beaker. 0.59 g of PVOH with R6G (MW:89,000-98,000)(prepared on 30/01/2013) placed in to the beaker. Drops of 1M of HCl were added to the beaker until pH was close to 2.5. | |||
*30 ml of water added to the beaker. 0.60 g of PVOH with R6G (MW:89,000-98,000)(prepared on 30/01/2013) placed in to the beaker. Drops of 1M of HCl were added to the beaker until pH was close to 3.5. | |||
'''Part B: swelling study''' | |||
* Measure the mass of each hydrogel. | |||
* Place the hydrogel in to a beaker with 20 ml of water. | |||
*Masses of hydrogels before placing in to the water. | |||
1)PVOH (MW:146,000) with R6G (prepared on 30/01/2013)=0.22g | |||
2)PVOH (MW:130,000) with R6G (prepared on 30/01/2013)=0.66g | |||
3)PVOH (MW:89,000-98,000) with (prepared on 30/01/2013)=0.55g | |||
==Data== | ==Data== | ||
Observation 1: PVOH with 22,000 molecular mass was still liquid after 3 cycles therefore it can be concluded that it might not be a good candidate for this research. | Observation 1: PVOH with 22,000 molecular mass was still liquid after 3 cycles therefore it can be concluded that it might not be a good candidate for this research. | ||
Observation 2: Photos of hydrogels | |||
MW= 22,000g/mol(it was still liquid.) | |||
[[Image:2013-02-08 12.18.19.jpg|center|400px|]] | |||
MW=89,000 g/mol (most homogeneous hydrogel) | |||
[[Image:2013-02-08 12.19.11.jpg|center|400px|]] | |||
MW=130,000 g/mol (It was not homogenous. undissolved solids were visible in the hydrogel) | |||
[[Image:2013-02-08 12.21.31.jpg|center|400px|]] | |||
MW=146,000 g/mol (it was not homogenous. visible undissolved solids were present) | |||
[[Image:2013-02-08_12.25.11.jpg|center|400px|]] | |||
==Notes== | ==Notes== | ||
*Nanohydrogels are still going through their second cycle. Third cycle will end on 09/02/2013. |
Latest revision as of 22:25, 26 September 2017
Experimental Chemistry | Main project page Previous entry Next entry |
ObjectiveDescriptionPart A: pH study *HCl solutions with different pH were prepared( pH 1.5, 2.5 & 3.5) in order to mimic the pH of stomach. Each hydrogels were left in the solution until wednesday.
1)PVOH (MW:146,000) with R6G (prepared on 30/01/2013)=0.22g 2)PVOH (MW:130,000) with R6G (prepared on 30/01/2013)=0.66g 3)PVOH (MW:89,000-98,000) with (prepared on 30/01/2013)=0.55g DataObservation 1: PVOH with 22,000 molecular mass was still liquid after 3 cycles therefore it can be concluded that it might not be a good candidate for this research.
MW= 22,000g/mol(it was still liquid.) MW=89,000 g/mol (most homogeneous hydrogel) MW=130,000 g/mol (It was not homogenous. undissolved solids were visible in the hydrogel) MW=146,000 g/mol (it was not homogenous. visible undissolved solids were present) Notes
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