Red Cabbage Indicator Aim – To create a pH indicator out of a red cabbage solution and to construct a basic pH scale to determine the pH of unknown solutions. Materials - • red cabbage leaves • 250 mL beaker • hotplate or Bunsen burner‚ tripod‚ gauze mat and bench mat • 10 test-tubes – equal size • test-tube rack Methods - Part A: Making the indicator 1. Tear up one or two red cabbage leaves‚ and place them in the beaker with enough water so that the cabbage is just covered. 2. Heat the beaker
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------------------------------------------------- COLORIMETRIC DETERMINATION OF pH ------------------------------------------------- Abstract This experiment examined the result of the various color indicators combined with different buffer solution‚ thereby testing the precision and accuracy of determining the pH value colorimetrically. Colorimetric method is a simple and practical procedure with an important advantage: they do not get out of order as from time to time do the pH-meters. Four buffers (Acetate buffer‚ phosphate
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Chapter # 1ABOUT GREEN HOUSE1.1: WHAT IS GREENHOUSE 1.2: HOW DOES GREEN HOUSE WORK | page23 | Chapter # 2: About GREEN HOUSE EFFECT2.1: what is green house effect2.2: causes of green house effect | 45‚6 | Chapter # 3:GRREN HOUSE EFFECT AND BANGLADESH3.1: Green house effect & Bangladesh3.2: Green house effect causing the global warming in Bangladesh3.3: Green house effect in Bangladesh 3
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005 .665 .655 .84 .02 .01 Respiration in Beads‚ Germinating Peas‚ and Dry Peas Using Respirometers Beads Alone Germinating Peas Dry Peas and Beads Time Interval (min) Rates (ml of O2/min) 0-5 .056 5-10 .002 10-15 .054 15-20 .002 Rates of Germinated Peas
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can reach a new pH level by interacting with soil. If water has a pH that is too high or too low‚ it can be life threatening to aquatic species and can corrode metal structures. After finding this out‚ I decided to test if water could reach an extreme pH just by interacting with soil around it. The question for this experiment therefore became the following. Will interaction with soil change the pH of water? I hypothesized that if water interacts with soil for three days‚ then the pH of the water will
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To begin the process of extracting DNA‚ the double-stranded hereditary material found in all living organisms‚ from the cells of split peas‚ a solution was made by blending split peas (100ml)‚ table salt (less than 1ml)‚ and cold water (200ml). The salt helped the DNA strands of molecules to stick together to be easily seen later in the experiment. The split pea cells were separated from each other by the blending process which had made them more susceptible to the next added ingredients. The blended
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GLOBAL WARMING AND GREEN HOUSE EFFECT – HOW CAN WE STOP THEM ? The greenhouse effect occurs when certain gases in the atmosphere trap infrared radiation whereas Global warming refers to an increase in the average temperature of the Earth as a result of the greenhouse effect. Burning fossil fuels raises the level of carbon dioxide in the atmosphere‚ and it is a major contributor to the greenhouse effect and global warming. We can help to reduce the demand for fossil fuels‚ which in turn reduces
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red‚ you felt the effects of an incorrect pH level. pH measures the concentration of hydronium ions and can be modeled by the function p(t) = −log10t. The variable t represents the amount of hydronium ions; p(t) gives the resulting pH level. Water at 25 degrees Celsius has a pH of 7. Anything that has a pH less than 7 is called acidic‚ a pH above 7 is basic‚ or alkaline. Seawater has a pH just more than 8‚ whereas lemonade has a pH of approximately 3. 1) Create a graph of the pH function either by
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The term green washing denotes the use of false or misleading information concerning green marketing by companies to compel consumers to buy their products on the perception that the company is environmentally friendly. It involves the misleading use of green marketing to endorse a false perception that the company products or policies are environmentally friendly. Green washing has been growing in the recent years mainly due to the increasing demand for green products. Due to increasing
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Ph Lab Report Bryon Kim 123013 B(2) Biology Background information/Research PH paper (litmus paper) determines how acidic or how basic a substance is. The paper changes color accordingly to color code on the pH scale. The pH scale starts from 0 to 14. The lower the number the more acidic it is. Zero is the most acidic‚ and 14 is the most basic while 7 is the neutral number for example water. Examples of an acid is lemon juice or multi purpose cleaner. Examples of a basic substance is shampoo or liquid soap
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