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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Title: Physical and chemical changes‚ and measurements in the metric system Name: Goh Kian Shen Lecturer: Dr. Anne Kee Hooi Ling Section: Chemistry 107A Date lab was performed: 17 January 2013 Aim: The aim of the experiment is to understand physical and chemical changes of different matters
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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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1.Explain what is meant by the term ‘physical change’ A physical change is where the appearance or traits of the substance/item change these changes can be‚ change of size‚ shape‚ color‚ volume and state. The molecules in the substance can be rearranged but their composition must stay the same. No new substance can be formed. They can be reversed most of the time. 2. Describe one example of a physical change in everyday life and explain why it is a physical change. Melting an ice cube is a common
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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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grades Change And The World Changes For You • Home Page» • Miscellaneous Research Papers Change And The World Changes For You CHANGE AND THE WORLD CHANGES FOR YOU! The famous social worker THE MAHATMA of our country said a famous adage "BE THE CHANGE THAT YOU WISH TO SEE IN THE WORLD" for us to adhere. Change is not going to come if we wait for some other person‚ or if we are waiting for some other time we are the ones for whom we were waiting for‚ we are the change that we seek
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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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life‚ we make decisions‚ decisions that may change the world we live in‚ if only slightly. However‚ each decision we make has an impact on our life and is therefore important. Each time we choose one thing over another‚ we draw from our previous knowledge to make the best choice we can. However‚ the ideas and thoughts that actually dictate how we make our choices are the morals that we base our life on. For some‚ these morals are simple and do not reflect what their life means to them‚ but for others
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Experiment 7: A Study of Chemical Changes: Types of Chemical Reaction INTRODUCTION Chemical changes are results of chemical reactions. All chemical reactions involve a change in substance and a change in energy. They are either chemical elements or compounds. A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products. There are different types of chemical reaction classified into 4 general types‚ namely‚ Synthesis‚ Decomposition
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You Decide: Susie Marks vs. City of Elsewhere and Officer Ruthless Susie Marks caught a ride to Elsewhere City Park from Orson‚ who then dropped her off and left. She met her friend Jerry and his girlfriend Kate. Orson was to return for Susie at 11:00 p.m.‚ which is the park’s curfew. Around 11:00 p.m. Officer Ruthless of the Elsewhere Police Department‚ approached the three minors and informed them the park was closing and instructed to leave the park immediately. Unfortunately‚ Orson had not
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