Observations of Chemical Changes Lab Report Expectations: Data Table 1: What you Expected to happen Well #/ Question Chemicals Reaction A NaHCO3 and HCI - C02 A bubble occurrence B HCI and BTB A deep yellow C NH3 and BTB A purple color D HCI and blue dye A deep blue E Blue dye and NaOCI A greenish color F NaOCI and KI A bright red G KI and Pb(NO3)2
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of Experiment: Observation of Chemical Changes Purpose: To examine the reaction of common chemicals from household consumer products‚ and the changes they undergo. Procedure: After combining the chemicals listed below in Data Table 1‚ I observed the mixture against white and dark backgrounds by slipping white and black paper underneath the well plate. For every reaction‚ I wrote down the chemical combination‚ the well number‚ and my observations of the chemical reactions against the white and
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Physical and Chemical Changes Say you are presented with two beakers‚ beaker A and beaker B‚ each containing a white‚ powdery compound. * a. From your initial observations‚ you suspect that the two beakers contain the same compound. Describe‚ in general terms‚ some experiments in a laboratory that you could do to help prove or disprove that the beakers contain the same compound. You may try some of the followings: * Dissolving in water * Dissolving in different chemical solution
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memory. Recent evidence identifies certain alterations in these areas of the brain in people suffering from depression (Coltrera‚ Jungle‚ & Leinwand 2008‚ p. 6). Structural changes in the brain may also be accompanied by chemical imbalances from a dysfunction of one or more neurotransmitters. Neurotransmitters are chemicals in the brain that transmit information from
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Naphthalene Ball in Water Objective: In this experiment‚ we will determine if the naphthalene can be dissolve in water or not. And what will happen in the filter paper if we stick it in the funnel and let it absorbed the fumes in the boiling water with powdered naphthalene. Materials: Evaporating dish Spatula Watch Glass Filter paper Tripod Mortar and pestle Alcohol Lamp Funnel Beaker Data: Naphthalene 1. white crystalline compound 2. has a strong odor 3. round
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Detecting Deception Erik Skrudland Columbia Southern University Abstract Since the day you first learned to lie as a child‚ your parents have probably demonstrated extraordinary talent at knowing when you are telling the truth…..and when you are lying. Did you ever wonder how they knew? Chances are it was collection of things called “tells” that you were unaware of that gave you away. When most people lie‚ their body goes through a serious of physiological reactions that are subconscious
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Detecting Plagiarism Chris Gibbs Gen/105 Learning in an Info Age Kara Moreu From using the Plagiarism Checker with a plagiarized paper‚ I see how this tool is helpful to students. The Similarity Index gave the paper I submitted a score of 100 percent plagiarized match to an Internet source. Having this tool at our disposal gives us the assurance that as long as we check our papers with this tool‚ we will have plagiarism free papers to submit. This is very important requirement for
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Flame Tests The flame testing is a method used in chemistry to detect the presence of certain ions‚ primarily metal ions‚ based on each element’s characteristics emission spectrum. The colour of the flames normally depends on the temperature. Different types of Bunsen burner with flame types depend on the oxygen supply. The flame of rich fuel with no premixed oxygen produces a yellow diffusion flame. The flame of lean fully oxygen premixed flame produces no soot and the flame colour is produced
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Detecting Plagiarism Detecting Plagiarism By submitting the document “Lab Courses Go Virtual” by Thomas F. Edgar I found that the article was completely plagiarized from an internet source. Had this been a minor‚ unintentional infraction and was the first account I would have given the student an opportunity to explain and possibly correct the error; however‚ this was a straight copy of the internet source. My course of action would be to sanction the student
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Challenge #1 — The Penny Problem: The first challenge to complete is the Penny Problem. The radio station is giving the winner of this challenge a prize pack that includes tickets to see his or her favorite band in concert. To start off the challenge‚ the radio station has placed pennies in a cylindrical glass jar. Each penny is 0.75 inches in diameter and 0.061 inches thick. If the cylindrical glass jar containing the pennies has a diameter of 6 inches and a height of 11.5 inches‚ how many pennies
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