Department of Chemistry Physical and Chemical Properties Submitted by: Date Submitted: 2/2/2014 Date Performed: 1 Lab Section: Course Instructor: PURPOSE: To identify chemical and physical change in matter. PROCEDURE: Finding out the physical and chemical change in matter. There was seven different substances that were being tested; Mossy Zinc (Zn)‚ Magnesium (Mn)‚ Copper (Cu)‚ Magnesium Oxide (MgO)‚ Copper II Nitrate (Cu(NO3)2)‚ Copper II Carbonate (CuCO3) and Sodium Chloride
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accuracy of chance in the detection of deception (Ekman‚ O’Sullivan & Frank‚ 1999). This in turn is also said to be influenced when experts has experience in interrogating liars‚ making them more confident in detecting deception. Besides‚ in the same study‚ it is said that men is better at detecting deception over women (Mann‚ S.‚ Vrij‚ A.‚ & Bull‚ R.‚ 2004). The study by Mann et al. is of a high stake lies scenario which is also the main strength that differentiates them from previous studies. The judges
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Patrick Kelly 10/16/12 Physical and Chemical Changes Lab Question: How do you distinguish a physical and chemical change? Hypothesis: If we use these materials and use magnets‚ water‚ burners‚ and filters on the mixtures and elements given we should determine what kind of effect these materials given will have on these mixtures and elements‚ physical or chemical. Procedures: -Part A: Record all observations of Part A in Data Table 1 1. Label each substance on seven pieces of paper
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officers in solving a crime. It can also help border control agents to detect potentially dangerous individuals during routine screening interviews. Currently‚ the most successful and widespread system is the polygraph which monitors uncontrolled changes in heart rate and electro-dermal response‚ as a result of the subject’s arousal to deceit. Unfortunately‚ its widespread use does not necessarily mean it is a perfect system. Firstly‚ in order for it to take the necessary measurements‚ it needs to
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Detecting Media Bias Everyone has their opinion. How much opinion should be allowed when it comes to the news? Is it possible to see a reporter’s bias when they report the events happening in our towns‚ states‚ country‚ or the world? This is when the reader‚ listener‚ or viewer needs to follow specific tips to understand the information at hand. The public has the ability to differentiate between facts and impressions. Recently‚ there was an article online about a bill that has stumbled in
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Observations of Chemical Changes Page. 14 Objectives: The objectives of this experiment are: 1. To observe some properties of chemical reactions 2. to associate chemical properties with household products Background Information: Chemical changes are often accompanied by physical changes. Three that you should not see in this lab are changes in temperature‚ presence of a flame‚ and evolution of light‚ as when as firefly glows. Three physical changes that indicate a chemical change may have occurred
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Observations of Chemical Changes Purpose: The purpose of this experiment is to observe chemical changes in common consumer products to determine if the chemicals are basic‚ acidic‚ or remain neutral when mixed with other chemicals. Procedure: In this experiment‚ various chemicals were mixed together‚ to determine a reaction. Using two drops from chemical 1 and two drops of chemical two‚ unless otherwise stated‚ then recording the type of physical reaction or color changes that occurred.
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Observation of Chemical Changes Purpose In this experiment‚ the student studied the composition of materials in a setting where the indications of chemical changes were safely observed. The changes observed consisted of bubble formation‚ colors‚ viscosity‚ and precipitate formation. Procedure Using a well plate: use a different well for each chemical combination. Two drops (unless otherwise noted) of each chemical in the combinations (below) should be placed in one well. A dark and light
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Rachel Rodriguez Anthony Chirumbolo December 8‚ 2011 Chemistry I‚ Pd 11‚ Station K Evidence of Chemical Change Purpose To observe several chemical changes (reactions) and the evidence they exhibit for chemical change. Data See page 3 Analysis The two terms that describe possible energy change in a chemical reaction are Exothermic‚ for example when a gas is formed when Copper II Chloride and Aluminum are mixed‚ and Endothermic‚ for example when copper II Hydroxide is heated
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Name: Jocelyne Munguia|Date: 6/12/13| Exp 1: Observations of Chemical Changes|Lab Section: 75426| Data Tables: Part 1: |Chemicals|Well No.|Observations of the Reaction| A.|NaHCO3 + HCl|A2|Tiny bubbles formed around the edges. Under white paper it looked transparent‚ but under black paper there was some white in the middle. | B.|HCl + BTB|A3|The mixture turned yellow instantly. Under white paper the mixture was more of mustard yellow and under black paper it was less of a bright yellow. | C
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