The yield of a metal from a particular mineral or ore is the mass of metal that can be obtained from a particular mass of the mineral or ore‚ and is often expressed as a percentage. It is possible to use formulae to calculate/predict yields of metals from particular minerals (pure compounds)‚ for ores we have to measure them experimentally. This is because ores are mixtures of the required mineral and unwanted material‚ and‚ being mixtures‚ they have variable composition. Measurement of the yield
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synthesize benzoin from the condensation of benzaldehyde. A yield of 28.91% benzoin was obtained. The MP of benzoin was 127O-130O C and the IR spectra displayed a carbonyl peak at 3415 cm-1 ‚‚which represents and OH functional group. The second step of the reaction was to oxidize benzoin to form benzil; this reaction yielded 27.04% benzil. The MP of the benzil was 91O-93O C and the IR spectra revealed no OH functional groups. The last step of the synthesis was a double aldol condensation reaction
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577 g benzil Theoretical Weight of Product: 15.765 g benzil Percent Yield: 8.577 g * 100% = 54.4% 15.765 g Melting Point of Intermediate (Benzoin) Melting Point of Product (Benzil) Trial 1 – 129-131°C Trial 2 – 133-135°C Trial 3 – 132-135°C Trial 1 – 92-93°C Trial 2 – 92-94°C Trial 3 – 93-95°C Average Melting Point Observed (Intermediate): 131.3-133.6°C Average Melting Point Observed (Product): 92.3-94°C Theoretical Melting Point
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Assessment Title: Annotated bibliography that reflects your developing understanding of the cultural‚ social and theoretical issues linked to themes of inclusion In this assessment I shall describe an Annotated Bibliography on Autistic Spectrum Disorder. The important factors of inclusion in educational settings will be discussed and how parents as partners can help children’s development. Autism is a condition which affects
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Thiamine-Catalyzed Benzoin Condensation I.Conclusion Benzoin was produced by reacting 2 mols of benzaldehyde with the catalyst thiamine to form a new C-C bond. A total of 2.626 grams were recovered. There was a 33% recovery of benzoin. The low percent recovery could be due to the purity of the limiting reactant‚ benzaldehyde. Upon filtration‚ the mother liquid appeared oily making it more likely that the low recovery was due to the solution ‘oiling out.’ This could be avoided in the future
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Examine the reasons why some sociologists choose to use experiments when conducting research Examine the reasons why some sociologists choose to use experiments when conducting research Secondary sources of information come in many forms. These can range from official statistics produced by the government on areas such as schools and crime and data published on the internet or in books by other sociologists who did their own research. Many sociologists as well as doing their own research use secondary
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Jerome Bruner’s theory on scaffolding is about encouraging children to learn something new by supporting and helping them when they need help‚ and then letting the child do it on their own when the adult feels they are confident enough. Bruner believes that humans have the ability to learn and grow with no limit; therefore‚ practitioners should have confidence in the children to learn something new. Although Bruner’s theory is adult-initiated‚ it still empowers children. When the scaffolding takes
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GROWTH AND YIELD RESPONSE OF CHINESE CABBAGE (Brassica rapa chinensis) USING LED LIGHT‚ UV LIGHT AND FLUORESCENT LIGHT BULB AS A SOURCE OF LIGHT A High School Thesis Presented to the Research Committee and Submitted to Mrs. Luzviminda M. Bago In partial fulfillment of the Requirements in the Subject Research II By: Nidera‚ Jeffrey A. Garcia‚ Jill Anne Ruth V. Trampe‚ Mariel Petals P. Dasmariñas National High School IV-Galileo Special Science Curriculum S.Y. 2011-2012
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In this essay I will be using the school of New Historicism and Feminism in order to write a comparative analysis of William Shakespeare’s ‘The Taming of the Shrew’. I will discuss how intertwined the relationship between historical and textual is in Shakespeare’s play‚ and how it is almost impossible to study the play outside its social context. I will pay particular focus on New Historicisms substantial emphasis on ideas of power and consider Michel Foucault’s essay ‘Discipline and Punish’ in
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Michaela Lawes SOUTH1A 11 Jacqui Godfrey Hypnotherapy & Counselling Skills – Module 2 1850 words “A personalised induction will always be more effective”. Discuss. Base your answer on theoretical concepts and techniques presented in class. If it is true that we all see the same thing but interpret it as different‚ if we respond to stimuli in a unique way‚ then a personalised induction would prove more effective. Would an anxious client respond to a linguistically passive approach
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