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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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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Observations and Chemical Changes By: Andre the Giant Higgson 02/19/14 CHE 107 E1 Intro to Chemistry 1 Objective Certain Chemicals like Bromthymol blue and Phenolphthalein can be added to other chemicals to determine acidity or basicity. Other reactions can be observed as well when different chemicals are added to each other. Procedure This experiment involved placing drops of specified chemicals into a well on a 96well plate. Each well number was recorded along with question number and name of chemicals involved
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LAB REPORT 4 Observations of Chemical and Physical Change PART 1 – OBSERVATIONS OF CHEMICAL CHANGE No credit will be given for this lab report if the Data section is not completely filled out and if the required photographs are not received. At least one photograph must show the student’s face. OBJECTIVES 1. Observe physical and chemical changes. 2. Define physical and chemical change. 3. Identify the relationship between a chemical change and a chemical reaction. 4. Observe several indicators
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Purpose or Objectives: Observe several changes in matter and write questions concerning the properties of the samples. Data Table: Conclusion: 1. Write at least ten questions that you would like answered about this experiment. 1. What is the identity of Crystal “X”‚ Liquid “Y”‚ and Liquid “Z”? 2. Why were the colors different when Crystal “X” was added to Liquid “Y”‚ but when they were mixed it turned from green to blue? 3. Why did the metal foil turn brownish red once added to Crystal
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Chemical Changes VS Physical Changes Lab Report (Full Name) 3rd period Purpose: To observe the difference between chemical and physical changes. Materials: * * Hot plate * Water * Salt * Evaporating dish * Candle * Matches * Ammonium hydroxide * Watch glass * Phenolphthalein * Paper towel * Cornstarch * Iodine * Cup * Alka-Seltzer tablet * Pipet * Milk * Vinegar * Copper II sulfate * Lead II nitrate Safety:
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Stazi Belvin Chemical and Physical Lab Changes Lab Report 9/5/2014 I. Purpose- The overall purpose of the lab is to identify chemical and physical changes. II. Safety- To work with the chemicals used in the lab‚ it is required to wear safety goggles to protect your eyes from the fumes when working with the chemicals. It is also required to be cautious when working with the acids used in this lab because they can cause burning and irritation of the skin. Also‚ be cautious as to not inhale the
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Purpose: To investigate the difference between physical and chemical changes in matter. Materials: Safety glasses 13 small test tubes Test tube rack Test tube holder 2 100-mL beakers Funnel Watch glass Stirring rod Evaporating dish Magnet Magnifying glass Crucible tongs Spatula Balance Meeker burner Ring stand Iron ring Wire gauze Forceps Sulfur Iron filings Sodium Bicarbonate Sodium Chloride Sugar Sand Magnesium ribbon Hydrochloric Acid Distilled water Filter paper
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Some Chemical Reactions in Everyday Life Science being a subject of common interest‚ it is very intriguing to analyze visual experiments happening in day-to-day life. There are a plethora of products that you use everyday‚ which are formulated with application of chemical reaction. Say for example; toothpaste‚ soap‚ shampoo‚ cleaning agent‚ etc. are all results of chemical reactions. Following are some of the most profound chemical reactions‚ which we encounter in everyday life : Aerobic
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Michelle Felton Observation of Chemical Changes June 17‚ 2014 Chem 107 Purpose: To associate chemical properties with household products To observe some properties of chemical reactions Procedure: Using a 96 well plate and a pipette each chemical was placed into its individual well‚ two drops of a second chemical were added and the observations of the reaction/changes were recorded. The new mixture was viewed on a light and on a dark background to observe all changes. Data Table
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