chloride and they form a solid precipitate. Then we poured it a funnel with a filter paper to get the solid precipitate. Purpose ● The purposed of the lab is to lets us student know if we know how calculate the percent yield of a double displacement reaction while using the grams that we get from our lab. Objectives ● We need to know the solid precipitate that had been formed in the
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of new species. (8 marks) SENIOR FIVE ORGANIC CHEMISTRY 1.Using suitable examples explain the following terms (a) Mechanism (b) Homolytic fission (c) Heterolytic fission (d) Electrophilic reaction (e) Nucleophilic reaction (f) Addition reaction (g) Elimination reaction (h) Substitution reaction (i) Chain reaction (j) Positive and Negative inductive effect 2. 25cm3 of a gaseous hydrocarbon P were mixed with 200cm3 of oxygen and exploded. After cooling‚ the residual gases occupied 137.5cm3. the volume
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research the chemistry behind a chemical reaction that is used in automobiles. Write a page that explains what the reaction is‚ where it occurs in the car‚ and what it does for the car. There are over one billion of cars around the world‚ getting people where they want to go. Therefore‚ automobile transportation became much more important in everyone’s daily life. Chemistry made the automobiles to work. The chemistry and chemical reactions used in many parts of the automobiles. The role of chemistry
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Chemical Reaction of copper compounds Introduction: In this experiment‚ the objective was to conduct a series of chemical reactions that contain copper or copper compounds. That is to say that the products of each chemical reaction were used in the next reaction. The process starts with a solid copper wire dissolved in nitric acid and the end product is copper powder. The product which was used from the previous reaction is the limiting. In the initial step‚ the solid copper is the limiting reactant
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Chemical Reaction: Cold Packs CHM110 Chemical Reaction: Cold Packs Introduction Chemical reactions happen every day in a variety of ways. We will explore the science behind cold packs and the chemical reactions that happen at the molecular level. Furthermore‚ we will examine and explain what chemical bonds are formed‚ broken‚ or both. The product is a simple construct of two bags: one containing water (solvent) and the other a chemical compound called ammonium nitrate (NH4NO3). In order to activate
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Purpose Determine which kinds of reactions involve electron transfer as the driving force. Background Redox (reduction-oxidation) reactions include all chemical reactions in which atoms have their oxidation state changed. So‚ when a metal and a nonmetal react‚ there is an ionic bond formed‚ which means one of them loses electrons while the other gains them. Since this reaction involves the exchange of electrons it is termed as a redox reaction. The oxidation states in a metal- nonmetal are simple
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Experiment 5: Wittig Reaction Purpose The purpose of this experiment is to synthesize trans-9-(2-phenylethenyl) anthracene using a wittig reagent formed by reacting phosphonium chloride with base. Experimental In a reaction tube‚ (0.200g) benzyltriphenyl phosphonium chloride‚ (0.115g) anthraaldehyde‚ and (.6ml) dichloromethane (DCM) is mixed together with a stir bar. We stirred the mixture rapidly and added (0.26ml) of a 50% NaOH solution dropwise. The mixture was stirred for 20-30
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work in the space Consider the following reaction: → 2NO2(g) 2NO(g) ϩ O2(g) ← At equilibrium‚ [NO] ϭ 0.80 M‚ [O2] ϭ 0.50 M‚ and [NO2] ϭ 0.60 M. Calculate the value of K for this reaction. 6. Nitrous acid is a weak acid that hydrolyzes according to the following equation: → H3Oϩ(aq) ϩ NOϪ2 (aq) HNO2(aq) ϩ H2O(l ) ← At 298 K‚ K ϭ 4.3 ϫ 10Ϫ4. a. Which term in the above equation does not appear in the equilibrium expression? b. For the above reaction‚ [H3Oϩ] ϭ [NOϪ2 ] ϭ 0.043 M at equilibrium
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Grignard Reaction: Synthesis of Triphenylmethanol Dominic DiRaimo Lab Partners: Roxana Hernandez Somata Thach TA: Sreya Mukherjee December 5‚ 2013 Introduction Grignard reagents are good nucleophiles as well as strong bases (Weldegirma). It allows compounds to react with acidic compounds‚ therefor is must be free from acids as well as water during the desired reaction. Another important aspect of Grignard reagent is that refluxing is necessary to
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Class X Question 1: Chapter 1 – Chemical Reactions and Equations Science Why should a magnesium ribbon be cleaned before burning in air? Answer Magnesium is very reactive metal. When stored it reacts with oxygen to form a layer magnesium oxide on its surface. This layer of magnesium oxide is quite stable and prevents further reaction of magnesium with oxygen. The magnesium ribbon is cleaned by sand paper to remove this layer so that the underlying metal can be exposed into air. Question
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