Posts Tagged ‘mold’
Soap Plaster
Friday, June 10th, 2011
I need help with this Chemistry question!!!!?
We did a lab where we had to remove soap from water… We tested with different substances. We had to put plaster of paris, borax, epsom salt, and sugar into 4 seperate test tubes filled with a soapy water mixture. By shaking the test tube, soap suds would arise, and we were to measure them. Then we compared with a plain test tube filled with just soapy water. The plaster of paris removed the most soap from the water!
Now we have questions to answer and i am really confused with this one:
What criteria did you use to determine if your experiment worked?
Does anybody have a clue? PLEASE? =[
Soap is basically the salt of a long chain fttay acid and using paster of paris you are doing an ion exchange experiment.
Ususally the ion the is attached to the fatty acid portion in soap is is either Potassium (Lye soap) or sodium.
Plaster of paris is escentially CaSO4 suspended in water. The Ca+2 exchanges with the K+/and or/Na+ ion to for the Ca-Soap which since it is not less water miscible settles out of solution.
How do you determine whether the experiment worked? -Wheh
well, if you do a flame test on the supernatant liquid you should see Na+ an/ot K+ ion in this solution.
As far at the solid – hmmmm- To this add a very conentrated solution of Na2CO3
if you are lucky you will get the soap back and CaCO3 as a ppt.
Awesome Snakes @ Plaster The Town 07, Soap Factory 8/12/08
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BRAIN MOLD $2.77 Mold Young Minds In your bilious-green zombie-brain mold. The plastic mold measures 9″ x 7-3/8″ x 3″ deep and comes with (2) recipes on the box: (1) for your natural, nauseating-gray-but-yummy brain gelatin mold, and (1) for a festive bright green version infested with worms. (Gummy worms not included.) Don’t like gelatin desserts? Switch to plaster of Paris and make a smart-looking paperweight…. |
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MOUSE LOLLY (MICKEY) Animal Candy Mold Chocolate $1.89 This is a first quality, tough plastic mold. It is durable and reusable. It is not machine washable. Suitable for chocolate and soap making as well as plaster and concrete crafting. FDA approved…. |
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EIFFEL TOWER Miscellaneous Candy Mold Chocolate $1.99 This is a first quality, tough plastic mold. It is durable and reusable. It is not machine washable. Suitable for chocolate and soap making as well as plaster and concrete crafting. FDA approved…. |
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12×12 Vacuum Form Machine – Plastic Former for Model, Mold, and Prototype Forming $129.95 Our 12″x12″ Table Top Vacuum Former is perfect for small businesses and hobbyists who want to create parts in plastic up to 1/8″ thick. Produce intricate shapes with results that rival expensive commercial machines in their incredible accuracy and detail: prototypes, custom packaging, RC car bodies, model rocket nose cones, molds for plaster or concrete, chocolate and candy, candles, and soap maki… |
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12×18 Vacuum Form Machine – Plastic Former for Model, Mold, and Prototype Forming $179.95 Our 12″x18″ Table Top Vacuum Former is perfect for small businesses and hobbyists who want to create parts in plastic up to 1/8″ thick. Produce intricate shapes with results that rival expensive commercial machines in their incredible accuracy and detail: prototypes, custom packaging, RC car bodies, model rocket nose cones, molds for plaster or concrete, chocolate and candy, candles, and soap maki… |
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Episode 6810 $0.99 … |
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Mold Making for Ceramics $34.95 This work demonstrates precisely the craft of making and using all types of molds, from decorative press molds to complex, multipart slip-casting molds. Each process is carefully described and illustrated…. |
