Aldol In this preparative lab‚ an aldol (trans-p-anisalacetophenone) was produced from the reaction between p-anisaldehyde and acetophenone with the presence sodium hydroxide. The reaction also showed the importance of an enolate and the role it played in the mechanism. Sodium hydroxide acts as a catalyst in this experiment and is chosen because of its basic conditions and pH. The acetophenone carries an alpha hydrogen that has a pKa between 18 and 20. This alpha hydrogen is acidic because of its
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Double Helix Readers Guide * Max Perutz – was the head of the unit where Crick works at Cambridge University. Perutz also shared important X-ray crystallography imagery with Watson and Crick that he had received from Maurice Wilkins and Franklin. Whether he was supposed to give this information to Watson and Crick without Franklin’s knowledge is unknown‚ nor is it entirely known how important her work was to the discovery of the structure. * Sir Lawrence Bragg – the head of the Cavendish
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Hardware Replacement Project IT/205 Chariot Sykes October 3‚ 2010 First off‚ the project could start with a project management plan. Project management activities include planning the work‚ assessing risk‚ estimating resources required to accomplish the work‚ organizing the work‚ acquiring human and material resources‚ assigning tasks‚ directing activities‚ controlling project execution‚ reporting progress‚ and analyzing the results (Laudon & Laudon‚ 2009). One should always consider
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experiment‚ equilibrium will be examines in the reaction beteween the iron (III) ion and the thiocyanate ion: Fe3+ (aq) + SCN- (aq) ------ FeSCN2+ (aq) The FeSCN2+ complex ion has a blood red color while the iron and the thiocyanate ion are colorless. Therefore‚ the shift in the reaction can followed by noting a change in the intensity of the clood red color‚ which indicates a change in the concentration of the complex ion FeSCN2+. If the reaction shifts to the right‚ the blood red color will get
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Cone crusher parts replacement methods: 1 when the cone crusher ore must be assigned to work in the middle of the disk ‚ in order to prevent crusher overload‚ make liner wear unevenly ; allow direct ore into the ore crushing cavity proper conditions are: ore distribution plate . uniformly dispersed in the crushing cavity ‚ can not give into the higher levels of ore rolling acetabular wall. 2 The maximum size of the ore crusher ≤ 85% to the mine mouth size ‚ otherwise it will lead to lower production
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Ball mill is mainly composed of a barrel body‚ lining plate‚ gear and other main components. Mill liners are of high wear resistance and also the replacement of mill liner of ball mill is very important. Because of the working condition and strength requirements of ball mill‚ the routine maintenance is very important. Repair for ball mill is a regular work. Repair work will have a direct impact on energy saving ball mill operation rate and life span. In order to detect the defects and eliminate
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There are eight types of chemical reactions. These eight reactions are Decomposition‚ Composition‚ Acid/Base‚ Synthesis‚ Single-Replacement‚ Double-Replacement‚ Precipitation‚ and Redox. Though these eight could be referred to as the same due to them being chemical reactions. They are actually very different. An example of this difference is Decomposition and Synthesis. Decomposition is when a compound is broken into smaller chemical species while a Synthesis reaction is two or more chemical species
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Recall the consideration from the philosophy of religion involving replacement of the unregenerate person with a “different person altogether” (cite‚ pp. 139). Does it follow that Jeremias experience a replacement of personal identity with a different person altogether? Epistemically speaking‚ it would seem that Jeremias did not survive a change‚ because although he is aware of the idea ‘homosexuality is immoral and therefore not entitled to having a status equal to heterosexuality’‚ yet rather than
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of an object is determined using a process called titration. According to Petrucci et al.‚ titration is a reaction carried out by the carefully controlled addition of one solution to another. It has several types like acid-base titrations and redox titrations. This experiment focuses on the latter type‚ the redox titration. A redox titration is based on an oxidation-reduction reaction between analyte and titrant (Harris‚2009). It involves the transfer of electrons between the two solutions. This
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with stupid thoughts brat. As I was saying‚ Chronus was quite interesting‚ I studied time and discovered lots of things‚ but back then I could barely slow time while leaving my mind conscious‚ but not my body‚ so it would be like having a faster reaction time‚ but nothing too useful against my stupid and treacherous sons‚ so I decided I wouldn’t reveal myself at that time. Ages later‚ I got to use my powers to slow time by half while leaving my body unaffected‚ so I worked harder‚ and seven years
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