LAB 6. ACIDS AND BASES: PH AND BUFFERS PURPOSE: To determine the pH of common acids and bases using a pH meter‚ pH paper‚ and red cabbage indicator. To test the effect of adding an acid or base to a buffer solution. SAFETY CONCERNS: Always wear safety goggles. Wash with soap and water if skin contacts acids or bases. ACIDS: An Acid is a substance that when dissolved in water will produce hydrogen ions‚ H+‚ in the solution. An acid that does not contain carbon is called an inorganic
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Singing in The Rain Brianna Walsh The Use of Singing and Dance in Singin’ In the Rain Singin’ In the Rain is a fantastic movie that shows the transition between silent films and “talkies.” This film‚ however‚ would have no impact what so ever if it were not a musical. The dancing in the movie gave it something different making the movie a classic‚ while the singing gave the premise of the movie. Lina Lamont would be the first problem with a normal film. If the movie did not have singing‚ the
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Review of the Purple Rain Album by Prince The renowned American recording artist by the name Prince produced what is always regarded as one of the best albums of all time‚ called the Purple Rain. It is his sixth studio album which he co-produced with Revolution Band‚ who helped him in the recording and famed for its great soundtrack. It was his first time recording with this band‚ and they killed it. Warner Bros. Records released the album on June 25‚ 1984. Currently‚ the top hit album has sold over
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Ernest Hemingway (1899-1961) CAT IN THE RAIN Ernest Hemingway’s importance as a creator of a unique style‚ as n speaker for the "lost generation"‚ as a humanitarian and an antifascist cannol be overestimated. "Cat in the Rain"‚ published in the first collection of his short prose (192 S) remains one of the stories most often reprinted‚ translated and admired by tin- readers. It is also highly characteristic of his individual manner. There were only two Americans at the hotel. They did not know
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“Cat in the Rain” recounts the story of an American couple on vacation in Italy. The entirety of the story’s action takes place in or around the couple’s hotel‚ which faces the sea as well as the "public garden and the war monument".Throughout the story it rains‚ leaving the couple trapped within their hotel room. As the American wife watches the rain‚ she sees a cat crouched “under one of the dripping green tables.” Feeling sorry for the cat that “was trying to make herself so compact she would
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Vol. 1 ACETIC ACID 115 ACETIC ACID 1. Introduction Acetic acid [64-19-7]‚ CH3COOH‚ is a corrosive organic acid having a sharp odor‚ burning taste‚ and pernicious blistering properties. It is found in ocean water‚ oilfield brines‚ rain‚ and at trace concentrations in many plant and animal liquids. It is central to all biological energy pathways. Fermentation of fruit and vegetable juices yields 2–12% acetic acid solutions‚ usually called vinegar (qv). Any sugar-containing sap or juice can
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the concentration of the acid solution changes the rate of the reaction between dilute hydrochloric acid and magnesium metal. • As the metal reacts with the acid‚ hydrogen gas is produced and the metal dissolves. To get an estimate of the rate of reaction‚ the time taken for a small piece of magnesium ribbon to dissolve (disappear) can be measured. This is a “clock reaction” and the reaction rate is proportional to 1/time taken SAFETY Dilute hydrochloric acid is harmful. Wear safety spectacles
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Amino Acids Glycine is the smallest of the amino acids. It is ambivalent‚ meaning that it can be inside or outside of the protein molecule. In aqueous solution at or near neutral pH‚ glycine will exist predominantly as the zwitterion. Alanine is a hydrophobic molecule. It is ambivalent‚ meaning that it can be inside or outside of the protein molecule. The α carbon of alanine is optically active; in proteins‚ only the L-isomer is found. Serine differs from alanine in that one of the methylenic
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How does Hughes present a sesne of fear and menace in this story? The rain horse by ted hughes is a short story text. Ted hughes was a prolific poet and was more celebrated for his poetry than his prose. This narravtive reflects his poetry through the very vivid imagery created by the description of the blinding rain and mysterios horse. Hughes presents a sense of menace and fear through the description of the horse and the horse following him. Hughes presents menace ad fear through the limited
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Rain pummeled the sunken roof of the old barn. Water seeped through the soaked‚ moldy plywood and dripped into muddy puddles below. The distant roar of rain and thunder almost muffled the sound of a field mouse as she pulled at a tear in an old sofa at the far end of the barn. She tugged at the brittle fabric‚ trying to extract the light‚ white fluff for her nest. A barn swallow shivered in the rafters‚ preening and drying his wet feathers. Despite the ferocious storm‚ all was peaceful in the barn
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