Determination of the Rate Constant for a Chemical Reaction Department of Chemistry Abstract This experiment was performed to determine the rate constant k‚ for hydrolysis of tertiary butyl chloride to tertiary butanol. The solvent system for this reaction is 45% isopropyl alcohol and 55% water. The rate of hydrolysis of t-butyl chloride is measured by the decrease in the concentration of this reagent with time. The rate of decomposition of t-butyl chloride must be equal to the rate of formation
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The rate of a chemical reaction is the measure of change in concentration of the reactants of the change in concentration of the products per time. The rate of a chemical reaction is influenced by the concentration of the reactants‚ temperature‚ and the presence or absence of a catalyst. Through finding the time and concentrations of the reactants‚ it is possible to find the rate of reaction and k. To perform this experiment‚ you need two erlenmeyer flasks‚a timer‚ a LabQuest with a temperature
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A rationale of the outline scheme of work for Key Stage 3 Planning is a key part of teaching. Without a coherent plan lessons may lack structure and direction. Long and medium term planning are an important part of this and in this rationale I hope to demonstrate that my planning does indeed have all of these qualities. The first element to be considered when rationalising this scheme of work is whether or not it meets the needs of Key Stage 3 pupils. I believe that it does because the attainment
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customers’ needs anymore. So‚ our company has designed a brand new promotional gift. It can best suit our clients’ needs and lifestyles. This is – a heart rate watch. First of all‚ if you look at this paper‚ you can see that this watch has a function that has never been designed for before – a heart rate monitor. It enables the users to measure their heart rate while doing exercises. Actually‚ the underlying purpose of this design is to immerse into customers’ daily lives. Let’s imagine that‚ when you are
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Methamphetamine. Crystal Meth can be called Several names‚ examples include crank ‚ chalk ‚ or speed. Best stimulant methamphetamine was developed in 1919 by Japan methamphetamines have been used throughout history in World War II the Japanese Pilots would use it to stay awake during the fifties ‚ it could also have been used for weight loss and to help treat depression. Methamphetamines became illegal in the US in the 1970s and most forms today crystal meth is made everywhere in the US‚Canada Thailand ‚Czech
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conductors - low value for current passing Strong bases : group 1 hydroxides (ie NaOH etc)‚ or lower group 2 hydroxides Ba(OH)2. - good conductors Weak bases : NH3‚ CH3CH2NH2. - poor conductors Reaction rates Similarly‚ the rate of reaction will reveal the strength of an acid. The rate of a chemical reaction is usually proportional to the concentration of the reactants. As it is the hydrogen ions that
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Dr. K. W. Lau [Robert]‚ Assistant Professor [tcrobert@polyu.edu.hk] [852 - 2766 6466] [Room: ST 707] Explain the use of memory systems on strengthening your studying area(s)? Ng Yan Kin Department of Civil engineering The Hong Kong Polytechnic University 12098159d Abstract This paper is about exploring the use of memory system on strengthening study areas. In the paper‚ literatures are used to reveal the basic knowledge and functions of memory
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1.1 Explain the sequence and rate of each aspect of development that would normally be expected in children and young people from birth – 19 years. Physical 0 -3 When a baby is born they are unable to hold their own head up however they will tilt their head towards light or noise within their first months. When spoken to they will react by looking at or watching you. As they develop they will be able to support their own head and wave their arms around and bring them together‚ the same with
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will be negative‚ and one message will be persuasive. If you decide to write a negative email‚ you will also write a persuasive memo. If you select a persuasive email‚ then your memo will be negative. WRITTEN ASSIGNMENT ONE: write a brief email (300 or fewer words). Make certain to include a subject line that will get your audience’s attention. NEGATIVE - Case 9‚ Looney Launch coming back to earth: Informing retailers about the demise of a popular product. Now it is time to follow up on the internal
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