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22 Jul 2008, 6:39 PM
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| feel like an angel  HSC: 2008 Gender: Female
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17 Jul 2009, 11:09 PM  | Detergents You can hide this advertisement by registering. Perform a first hand investigation to distinuish between anionic, cationic and non-ionic synthetic detergents, in terms of chemical composition and usesAnyone done an experiment for this? |
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23 Jul 2008, 1:58 PM
| #2 (permalink) |
| Self-delusive  HSC: 2008 Gender: Male
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16 Jul 2009, 10:43 PM | Re: Detergents Noops. But at the first glance, do you think we test the conductivity? lolz. Ah, I think we test if they lather much (just shake them vigorously?). This's gonna indicate the non-ionic.
__________________ BPharmacy @ Usyd Class' 2013 When I was a child I caught a fleeting glimpse. Out of the corner of my eyes I turned to see but it was gone I cannot put my finger on it now The child is grown, the dream is gone... (Confortably numb - Pink Floyd) |
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24 Jul 2008, 9:16 PM
| #4 (permalink) |
| Self-delusive HSC: 2008 Gender: Male
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16 Jul 2009, 10:43 PM | Re: Detergents Hang on a sec. With lathering, how to you compare anionic and cationic. Don't say that you add a same amount of each detergents with same amount of water and same amount of Calcium ions (to make hard water), shake them with similar forces and compare their froth. It's gonna be bloody hard to observe that way. The amount of bubbles should be sort of equal! hix
__________________ BPharmacy @ Usyd Class' 2013 When I was a child I caught a fleeting glimpse. Out of the corner of my eyes I turned to see but it was gone I cannot put my finger on it now The child is grown, the dream is gone... (Confortably numb - Pink Floyd) |
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25 Jul 2008, 9:22 PM
| #5 (permalink) |
| feel like an angel HSC: 2008 Gender: Female
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17 Jul 2009, 11:09 PM | Re: Detergents just add approx same amts of each detergent to water, shake and then measure amt of lather. anionic lathers a lot more than cationic. i ended up with 8.5cm for anionic compared with about 1cm for cationic |
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25 Jul 2008, 10:09 PM
| #6 (permalink) | |
| ┗(^o^ )┓三  HSC: 2008 Gender: Male
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14 Jun 2009, 6:02 PM | Re: Detergents Quote:
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26 Jul 2008, 10:48 AM
| #7 (permalink) |
| Self-delusive HSC: 2008 Gender: Male
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16 Jul 2009, 10:43 PM | Re: Detergents You're right, they form soluble complex ions. With anionic detergents, hard water to some extent reduces the effectiveness of them by forming these complex ions. Thus, less amount of detergents truly participate in the washing process. I didn't say they form scum! But theoretically, I'd expect anionic to give less froth in hardwater. Alez, why didn't you use hardwater? You weren't told which one was cationic/anionic detergent, yeah?
__________________ BPharmacy @ Usyd Class' 2013 When I was a child I caught a fleeting glimpse. Out of the corner of my eyes I turned to see but it was gone I cannot put my finger on it now The child is grown, the dream is gone... (Confortably numb - Pink Floyd) |
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26 Jul 2008, 9:20 PM
| #8 (permalink) |
| feel like an angel HSC: 2008 Gender: Female
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17 Jul 2009, 11:09 PM | Re: Detergents got 3 samples, just added them to water and shook in test tube, measured height of lather and deduced which one was anionic, cationic and non ionic just using tap water. not too complicated |
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