16-3 Red Cabbage Juice pH Indicator Sources: Prof. George Ewing’s C100 Demonstration Notes; Prof. Carolyn Huffman’s Fall ’93 C100 lecture; B. Z. Shakhashiri‚ 1989‚ Chemical Demonstrations: A Handbook for Teachers of Chemistry‚ vol. 3‚ pp 162-166. Description and Concept: Red cabbage juice will change to a variety of colors when added to solutions of various pH. Red cabbage juice is a pH indicator. Materials: red cabbage* blender hot or boiling water filter paper (coffee filters
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* Baking soda (NaHCO3) * Hair conditioner * Shampoo * Hand soap * Cloudy Ammonia * Dish washing detergent Method: 1) Tear off leaves from the cabbage and tear them into smaller pieces. 2) Fill the larger beaker with about 150 milliliters of distilled water. Place the torn pieces of red cabbage into the beaker. 3) Place the beaker on tripod Turn the heat up to medium or medium high. 4) Once the water starts to boil‚ turn down the heat so it boils gently
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Red Cabbage Indicator Indicators are chemical compounds that can be added to a solution to determine whether it is acidicor alkaline. The indicator will change colour depending on whether an acid or an alkali is added. The colour in red cabbage (it is a pigment called an anthocyanin) makes a very good indicator. Acids and alkalis Acids have a sour taste‚ like vinegar (which contains ethanoic acid) and lemons (which contain citric acid). Alkalis are substances that react with acids and neutralise
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Associate Level Material LeafLab Report |Full Name |Cynthia Barriera | |Date |09/01/13 | Use this document to report your findings from the LeafLab Exploration Experiment. The lab report consists of three sections: Data‚ Exploration‚ and Lab Summary. Data: copy any data‚ graphs‚ charts‚ or notes that you have saved in your LeafLab online notebook into this section. Exploration:
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HSC Chemistry First Hand Investigation 2009 Scientific Report Aim: To carry out a fist hand experiment in the extraction of red cabbage pigment‚ use this extracted pigment to standardize against know pH’s‚ test 5 household items to determine the possible pH of these items by using the standardization and assess the pigment’s ability to be used as a Universal Indicator. Risk Assessment: When dealing with fire‚ the Bunsen burner should always be switched to the safety flame before lighting.
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The overall purpose of the lab is the understanding of the process and goals of the scientific method. This lab illustrates that this method is very useful to answer a question or address a problem base on observations and the available information. Hypothesis: There are more red marbles than black marbles. We were able to address our hypothesis with the data collected because 26.32% of the marbles are red and just 14.47% are black. Also‚ the percentage of red marbles is the biggest in comparison
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Red Cabbage Indicator Experiment Aim: The aim of our investigation was to identify and understand how different chemicals (Acids‚ alkalis and neutral) react and experience a change in colour due of this. Introduction: The red cabbage indicator shows how a usual household product such as red cabbage can make a suitable indicator and be able find out if a chemical is either and acid‚ alkali or neutral. Acids are a chemical that reacts with an alkali neutralising it producing water
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photosynthetic pigments and has a higher energy wavelength than red light‚ we predicted that juniper needles placed in blue light would photosynthesize faster than juniper needles placed in red light. We measured the rate of change in CO2 concentration due to juniper needles. For each sample‚ we placed the needles into a chamber connected to the CO2 monitor and measured the rate of change of CO2 concentration for 10 minutes under red light and then 10 minutes under blue light. We ran three independent
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THE EFFECTS OF Brassica oleracea L. var. capitata L. EXTRACT ON THE SPERM QUALITY OF Mus musculus A Research Presented to the College of Arts and Sciences Our Lady of Fatima University In Partial Fulfillment of the Course Requirements for the Degree Bachelor of Science in Biology By MARLIZA A. ARIÑAS JAMEE LORRAINE M. DELA ROSA GILBERT H. DIPACULANG JR. March 2013 Chapter 1 THE PROBLEM AND ITS BACKGROUND This chapter gives an introduction and background on the study. This chapter
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Why are some colors of light more effective than other colors? Answer Photosynthetic saturation is the maximum rate of photosynthesis. What was the value for photosynthetic saturation in tomato leaves? Answer Light quality does not effect the rate of photosynthesis. Answer Based on what you know about photosynthesis‚ provide possible reasons for what causes photosynthetic saturation (these cannot be determined from the graph). Answer Which color
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