RATE OF REACTIONS. The reaction rate (rate of reaction) or speed of reaction for a reactant or product in a particular reaction is intuitively defined as how fast or slow a reaction takes place. For example‚ the oxidative rusting of iron under the atmosphere is a slow reaction that can take many years‚ but the combustion of cellulose in a fire is a reaction that takes place in fractions of a second (right). Chemical kinetics is the part of physical chemistry that studies reaction rates. The concepts
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Real world cyber crime cases This document is an extract from the book Cyber Crime & Digital Evidence – Indian Perspective authored by Rohas Nagpal. This book is available as courseware for the Diploma in Cyber Law and PG Program in Cyber Law conducted by Asian School of Cyber Laws www.asianlaws.org Cyber Crime & Digital Evidence – Indian Perspective 23. Real World Cases This chapter serves as a ready reference guide. First the various scenarios are covered. A detailed discussion on
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Abstract This experiment is to study the effect of temperature on the rate of reaction between potassium permanganate with oxalic acid. We used 2cm3 of 0.02M potassium permanganate and 4cm3 of 1M sulphuric acid into a test tube. In another test tube‚ we placed 2cm3 of oxalic acid. We placed the test tubes in a water bath at 40‚ 45‚ 50‚ 55 and 60oC respectively. When the solutions have attained these temperatures pour the oxalic acid into the acidified permanganate solution and recorded the time
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Lab #4: Aqueous Reactions Introduction: In this experiment we studied the two different types of aqueous chemical reactions‚ double replacement and single replacement. In a double replacement reaction one or both of the products is an insoluble ionic compound or otherwise known as a precipitate; or a non-electrolyte; or a gas. In a single replacement reaction there is typically a metal and an ionic compound consisting of a metal cation and a non-meatl anion. Singel replacement ractions occur when
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ladies‚ and hurried from the ball to mount and ride against the French; while the frightened citizens crowded the streets‚ fearing that Napoleon was about to enter Brussels. Waterloo was a great victory for the English and Prussian armies. It was the real end of Napoleon’s all-conquering career‚ and led to his capture and banishment to the island of St.
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rate of reaction (mol dm-3 s-1) for the following chemical reaction: CaCO3(s) + HCl(aq) CaCl2(s) + H2O(l) + CO2(g) Research question: How does altering concentration (mol dm-3) of hydrochloric acid (HCl) affect the rate of reaction (g/s) for the following reaction: CaCO3(s) + HCl(aq) CaCl2(s) + H2O(l) + CO2(g) Background information: The reaction between calcium carbonate and hydrochloric acid is an example of a neutralization reaction between an acid and a base. Neutralization reactions involve
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High School Students’ Conceptions about Energy in Chemical Reactions (focusing only in exothermic and endothermic reactions). Aim The aim of this study is to investigate students’ understanding of the energy concept in chemical reactions particularly in endothermic-exothermic reactions. Both qualitative and quantitative methodology was used for this investigation. A twenty-item multiple choice test was developed about the topic to measure the students’ understandings. This concept test was
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Last October 3‚ 10 and 12‚ 2012 it was a hot afternoon when we watch a movie entitled Jack and the Beanstalk: The Real Story‚ this movie was related to our last topic in management 5. Instead of having a formal meeting in our subject in Social Responsibility and Good Governance‚ we need to watch because after that we need to have a reaction paper regarding the movie. In the beginning‚ the story makes me feel bored of watching and listening because the audio and the cast of the movie speak very
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Chapter 1 Chemical Reactions and Equations Q.1. Why should magnesium ribbon be cleaned before burning in air ? Ans: Magnesium ribbon is a very reactive metal. When stored it reacts with oxygen to form a layer of magnesium oxide on its surface. This layer of magnesium oxide being a stable compound prevents further reaction of magnesium with oxygen. The magnesium is cleaned before burning in air to remove this layer so that the metal can be exposed to air properly. Q.2. Write the balanced
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Reaction Paper Robert Rodriguez South West University Evolution a dove film created by Tim Piper‚ the author takes a unique perspective on how the social media defines beauty. The question is how do we perceive what’s beautiful and what really means to us. The definition of beauty or beautiful according to the (1) oxford dictionary is: 1 [mass noun] a combination of qualities‚ such as shape‚ color‚ or form‚ that pleases the aesthetic senses‚ especially the sight: [as: modifier] denoting
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