used in organic chemistry to identify unknown compounds. http://www.tutorvista.com/biology/uses-of-paper-chromatography Purpose: The purpose of this experiment is to compare the separation abilities of salt water and isopropyl alcohol using paper and candy pigments. Materials: Candy with a colored coating‚ like Skittles® or M&Ms® (4 different colors) Rubbing alcohol or isopropyl alcohol Coffee filters (2) Tall glasses or plastic cups (2) Pencil Ruler Tape Foil or paper plate Table salt Water Toothpicks
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These calculated products are determined using the limiting reagent‚ (the substance that runs out first which stops the reaction) and are called the theoretical yield. The theoretical yield is the amount of product that should be acquired during the experiment if all aspects go perfectly. However‚ due to experimental errors‚ very few labs do so. These results are called actual yield. The percent ratio between the theoretical and actual yield is called the percentage yield. It is calculated by taking the
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Imagine a world without the penny. No more happy children who think good luck will come their way when they find a penny heads up on the ground. No pennies around to make that old tin cup clink and brighten the day of some desperate homeless man. Charities‚ instead of thriving‚ would suffer due to penniless penny drives. Jobs would be lost due to the lower demand for zinc that could be mined and produced into American money. Most importantly‚ a significant part of history would be thrown away and
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|Faculty of Engineering & Science | |Unit Code |: |UEMK1013 | |Course |: |Chemical Engineering | |Unit Title |: |Chemistry for Engineering | |Year/ Semester |: |Year 1/ Trimester 1 | |Lecturer |: |Dr. Loh Han Chern | |Session |: |201101
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to stop minting the penny and to never use it again‚ but others want to keep using the penny and not get rid of it. Some people are fighting to get rid of the penny and these articles may pull people to their side: “Penny Wise‚ or 2.4 Cents Foolish?”(Source 1)‚ “Is the Penny Worth It?”(Source 2)‚ “Give a Penny-Save the Day!”(Source 3)‚ and “The Ever-Changing Penny”(Source 4). Some think the U.S. penny should be discontinued because it takes more than one penny to make a penny‚ it’s not worth much
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cider vinegar for acne treatment is said to be used because it has anti fungal and anti bacterial actions when it come in contact with the skin. This is why it is very powerful to prevent and cure other skin infections. There also comes face wash with a ingredients of Apple cider vinegar face wash will also help you remove excess oil from the skin. It balances pH levels and prevents the skin from becoming too oily or too greasy‚ as it normalizes the secretion of sebum. Apple cider vinegar acts
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the offer of picking up a penny off the floor? Well you made a great choice. For the past couple years there has been a huge debate over the ban of pennies. Some people feel as if the penny is useless to our currency‚ but some others felt that the penny plays a huge role in the U.S today. The argument today is whether the ban of pennies is going to boost our economy or plummet it. The penny should be eliminated because of the cost‚ worth‚ and rounding system. The penny to me has never been a huge
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Nail Care: A Quick Guide and Reason to Care (H2) Nail care is a topic that isn’t talked about enough. If your nails look crappy and you aren’t making the connections you want‚ there really is a reason why. When it comes to nail care‚ most people don’t understand why it’s such a big deal. They don’t understand why they should have to care for their nails and who is watching. The truth is‚ everyone that you come into contact with is looking at the condition of your nails. The fact is‚ your hands are
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CHEM 301 LECTURE Unit 1 0 . COORDINATION CHEMISTRY Factors t hat affect solubility: Common ion: decrease in solubility Complex ion: increase in solubility How does complex ion formation increase solubility? Consider the complex ion formation between silver and ammonia: + Ag + 2NH3 A g(NH3 )2 + Kf = 1 .5 x 10 7 where Kf i s the formation constant (always >1 ‚ formation of the complex is highly favorable) Complex ion formation increases the solubility of sol ids in water
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experimental techniques which can be used to tell us where the atoms are located in a molecule. Using advanced techniques‚ very complicated structures for proteins‚ enzymes‚ DNA‚ and RNA have been determined. Molecular geometry is associated with the chemistry of vision‚ smell and odors‚ taste‚ drug reactions and enzyme controlled reactions to name a few.
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