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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Acid Property #1: The word acid comes from the Latin word acere‚ which means "sour." All acids taste sour. Well known from ancient times were vinegar‚ sour milk and lemon juice. Aspirin (scientific name: acetylsalicylic acid) tastes sour if you don’t swallow it fast enough. Other languages derive their word for acid from the meaning of sour. So‚ in France‚ we have acide. In Germany‚ we have säure from saure and in Russia‚ kislota from kisly. Base Property #1: The word "base" has a more complex
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Experiment 4: ACIDS AND BASES: PH Measurements and Macroscale Titration CHM023L – A12 Group no. 6 Members: | Contributions: | | Conclusion | | Recommendation | | Tables and figures with analysis | | Principles‚ Equation | | Abstract‚ tables | Date Performed: February 28‚ 2012 - Tuesday Date Submitted: March 6‚ 2012 - Tuesday Submitted to: ------------------------------------------------- ABSTRACT: This experiment introduces us the pH measurement and application of macroscale titration
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| An acid is a chemical substance any of various typically water soluble and sour compounds that are capable of reacting with a base to for a salt‚ that redden litmus paper‚ that evolve hydrogen on reaction with various metals‚ that in water solution yield hydrogen ions‚ and that have hydrogen containing molecules or ions able to give up a proton to a base or that are substances able to accept and unshared pair of electrons from a base. An alkaline is a chemical compound that neutralizes or effervesces
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The purpose of this experiment was to study the effect acid rain has on seed germination and after performing this experiment is can be concluded that acid rain has a negative effect on seed germination. When seeds are soaked in an acidic solution the process of germination slows. Acidic solutions‚ while do slow growth of a seed‚ they do not kill the seed. A seed can be dormant for a majority of its lifespan‚ seeds watered with acid solutions stayed in a dormant condition. For example‚ trial three
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Acid precipitation affects stone in two ways: dissolution and alteration. The calcite dissolves when sulfurous‚ sulfuric‚ and nitric acids in polluted air react with the calcite in marble and limestone. Exposed areas of building and statues develop rough surfaces. Some of the material that makes them up are removed or corroded‚ thus‚ details and carvings are lost. Even sheltered areas of stone buildings and monuments are affected by acid precipitation. However‚ sheltered areas on limestone
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Jenna Zeringo Singin’ in the Rain In 1952 Gene Kelly and Stanley Donen directed MGM’s musical comedy “Singin’ in the Rain”. Fifty five years later in 2007 it ranked number five on the American Film Institute list of “List of Greatest Films”. It’s evocative to Americans and is generally considered the best Hollywood musical film; it was not a Broadway production until several years later. Gene Kelly not only directed the classic but he also choreographed and starred in it as Don Lockwood.
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Singin’ In the Rain Review Singin’ In the Rain (1952) Genre: Comedy‚ Musical‚ Romance Cast Don Lockwood: Gene Kelly Cosmo Brown: Donald O’Connor Kathy Seldon: Debbie eynolds Lina Lamont: Jean Hagen R.F. Simpson: Millard Mitchell Zelda Zanders: Rita Moreno Roscoe Dexter: Douglas Fowley Singin’ in the Rain is one of the most-loved and celebrated film musicals of all time from MGM‚ before a mass exodus to filmed adaptations of Broadway plays emerged as a standard pattern. It was made
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Autism and Rain Man In the movies things are portrayed in ways that are supposed to make the movie sell‚ which means that movies are not always accurate. The movie Rain Man was about a man and his brother‚ who happened to be an autistic savant. In Rain Man Dustin Hoffman played Raymond‚ who was a high-functioning autistic savant. In the movie Raymond had routines and rituals that he did; and when his routines were interrupted or he was afraid of something he had a temper tantrum where he would
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It was the monsoon season during the November holidays last year. It commonly rained then and the air was as fresh as a daisy. We stayed indoors frequently‚ except when the weather was breezy so that we could play outdoor activities such as flying kites‚ playing soccer in the lush green field and sometimes just enjoying the cool breeze which had blown past us. One night‚ my family and I went to bed earlier than usual as it was raining cats and dogs outside. We could not do much about the storm and
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