turn lighter No reaction; when both combined‚ the color (dark blue) remained the same Food coloring + NaOCl + CH3COOH No reaction; solution will remain blue Reaction; solution turns light gray Red cabbage + NH3 No reaction; solution will remain purple Reaction; solution turns into yellow green Red cabbage + CH3COOH No reaction; solution will remain purple Reaction; solution turns pink NaHCO3 + NH3 I predict that NaHCO3 combined with NH3 will bubble as a reaction. The NaHCO3 seems to be settled at
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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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to infer whether or not a substance is acidic or basic. Another indicator is red cabbage juice. Cabbage juice will turn pink when an acid is present‚ and it will turn blue when a base is present. Anthocyanins are the chemicals responsible for the color change in cabbage juice in different solutions due to a gain or loss in hydroxide ions (OH-). My blueberry indicator works in an extremely similar way as the cabbage juice. In conclusion‚ acid-base indicators will have some kind of change to their
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not combine‚ NaOCI separated to the bottom Food coloring + CH3COOH CH3COOH will turn blue CH3COOH darkened the blue color Food coloring + NaOCl + CH3COOH Will remain seperate Solutions returned to clear/cloudy‚ clear Red cabbage + NH3 Change to clear Turned green Red cabbage + CH3COOH Change to clear Turned pink NaHCO3 + NH3 Will mix Backing soda separated to the bottom NaHCO3 + CH3COOH Will create bubbles Bubbled over Na2CO3 + CH3COOH Bubble Small fizz‚ clouded the mixture MgSO4 +
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Biological Membrane Study: HCl‚ NaOH‚ SDS Objective and Hypothesis: The objective of this lab is to determine the effects of SDS‚ HCl‚ and NaOH on red cabbage cell membrane. Prior knowledge can tell us that the red cabbage is a red-purple color due to a pigment called anthocyanin. This is what we will be testing in the experiment. We also know that HCl is a strong acid (very low pH) and that NaOH is a strong base (very high pH). From information learned in this course (lecture/lab) we can assume
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As stated previously the purpose of this experiment was primarily based on about chemical changes. Many chemical changes are viewed through a screen‚ or read from a book. In this experiment‚ chemical changes are viewed directly from the eyes of the scientist. The procedure first begins by gathering all needed materials. Next‚ laying the first powder on four wells‚ followed by the next powders‚ each powder was placed on four wells. The liquids were then placed on each powder using the four droppers
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Fig. 7A displays the amperometric response of Ag/ZSM-5/CPE with successive injection of OA into a stirred solution of 0.1 M NaHPO4 pH= 2 recorded at the potential of 0.73 V vs. Ag|AgCl in the concentration ranges from 16 μM to 4.0 mM. It can be seen that the aerometric current increases clearly after each injection of OA. Fabricated sensor displays the rapid response towards change in the concentration of OA which reaches a steady state within 2 s by applying the potential of 0.73 V to Ag/ZSM-5/CPE
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ions means that the liquid has a low pH. Therefore a liquid with a low concentration of [H+] would have a high pH. A pH of less than 7 represents an acid‚ while a pH above 7 represents a base. A pH of 7 would be neutral. In this lab‚ we used red cabbage juice as a pH indicator to determine whether common household liquids were acidic‚ basic‚ or neutral. Using
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General Chemistry‚ 4th ed.‚ S.L. Murov‚ Experiment 21‚ Acids and Bases: Reactions and Standardizations‚ and Experiment 22‚ Acids and Bases: Analysis. There were modifications made by the instructor to dilute the 6M NaOH to 0.1M in 300mls instead of 500mls in Part B of Experiment 21. One objective for performing these two experiments was to observe qualitatively the reactions between common acids‚ bases‚ and the indicators phenolphthalein‚ methyl orange‚ bromothymol blue‚ and red cabbage extract
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Clinical Chemistry When people consider their careers in the health care field‚ most of them would think about being a physician‚ a nurse or a surgeon. Individuals with interest in the health care field are not aware of clinical laboratory science. I am one of those individuals who don’t know much about clinical laboratory science before. After taking the class “Introduction to Clinical Laboratory Science”‚ I start to realize that clinical laboratory scientists are just like other health care members
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