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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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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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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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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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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Observations of Chemical Changes Purpose/Hypothesis: To observe how acids react with bases and examine reactions of common household cleaners and the macroscopic changes these chemicals undergo. I expect for each solution to react differently when mixed with acids and bases. Procedure: I have a well-plate-96‚ a piece of white and black paper‚ and the chemicals from the Observation of Chemical Changes Experiment Bag. I used a different well for each combination of solutions. I placed two
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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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Mahlaqua Imran Chemical and Physical Changes Lab 09/09/13 I. Purpose: Identify the different changes as a physical change or a chemical change. II. Safety: You may need safety goggles and gloves. III. Pre-lab questions: 1. Identify the following as either chemical or physical changes: a. Striking a match Chemical b. Food spoiling Chemical c. Breaking a glass Physical d. Mowing the grass Physical
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