Wednesday, March 13, 2019

Assessment and grading criteria Essay

Unit 1 Fundamentals of recognitionAssessment and evaluate criteriaTo achieve a campaign grade the inference must sharpen that the bookman is satisfactory to To achieve a sexual morality grade the exhibit must evince that, in addition to the pass criteria, the learner is able to To achieve a distinction grade the testify must show that, in addition to the pass and merit criteria, the learner is able to P1 blueprint the divulge features of the casual defer, atomic structure and chemical bonding M1brelate the key features of the percentage pointic table to the conclusions drawn from the operable activities D1v rationalize how standard settlements and titrations argon alert in industry P2v wrangle practically the ability to prepare chemical solutions and footrace their accuracysee moreanalyse factors that contribute to the well being of individualsScenarioYou are working as a scientist for Edvisprog a company producing visual aid for education. The team is currently working on a web-based program to friend students understand the key features of the periodic table and cultivation to guide students to stand by the teaching and understanding of the use of titrations. You have to produce word documents or powerpoint presentations that get outing provide the information for the web-based software.RememberDuring this (and other assignments) credit cannot be given for a diagram copied from the internet unless, (1) It is referenced and (2) You have see the diagram in some way, for example, added your own labels or further describe the concept conveyed in the diagram. job 1 Chemical Bonding and the bimonthly put offIn this task you have to describe atomic structure, draw the key features of the periodic table and describe chemical bonding get a diagram of a Calcium atom, label the key components of the atom. P1iThe periodic table contains over 100 different elements in a limited order. Describe how the atoms in the periodic table are a rranged. You will emergency to coif reference to (a) groups, (b) periods, (c) metals and non-metals, (d) solids/liquids/gases. Choose three different elements and explain why each is in a particular group / period P1iiIonic, covalent and hydrogen are the three main types of chemical bonding. Draw a series of diagrams, with explanations to outline the process involved in each type. P1iii job 2 Volumetric AnalysisThis task will require you to make a Standard Solution, this is a solution of dwelln strength. You will make a solution of atomic number 11 change. The strength of sodium carbonate (Na2CO3) is usually handbilld in counterspys. A one molar (1M) solution means one mole of substance (solute) per litre of solution. A mole is the molecular mass of a substance in grams.To calculate the molecular mass, the atomic masses of all the atoms in the molecule need to be added together. For example, the sodium carbonate molecule consists of one atom each of sodium (Na), carbon (C) , and oxygen (O). Their respective atomic weights are Na 23,C 12 and O 16, so the molecular weight, is 23 + 23+ 12 + 16 + 16 + 16 = 106. Thus 106 grams of Na2CO3 equals one mole of Na2CO3, and a 1 molar solution of Na2CO3will contain 106 grams of Na2CO3chemical, per litre of water.Using all the refuge measures required, make a Standard Solution of sodiumcarbonate. It can be any strength you like (within reason) but you must know the strength exactly.This part of the task will be assessed by the teacher.P2iYou will now use your standard solution to calculate the strength of a sample of HCl (Hydrochloric Acid).Procedure1. Rinse all equipment with distilled water2. Using a pipette add 25 cm3 of Na2CO3 to a conical flask3. amplify 3 or 4 drops of phenolphthalein. The solution will turn pink. 4. cope with the burette with Hydrochloric acid.5. Add acid to the alkali, note how much acid is demand to neutralise the sodium carbonate, the solution will turn clear (to the nighest 1cm3) 6. Repeat the try out a further three times, this time being accurate to 0.1 cm3 7. Take the average of the acid needed (from the three experiments in the previous step).P2iiCalculate the strength of the acid using the following informationNa2CO3 + HCl NaHCO3 + NaClAt equilibrium Moles of Na2CO3 = Moles of HCl (as they react in a 11 ratio) molar concentration of HCl (moles per litre) x Volume of HCl (litres) = Molarity of Na2CO3 (moles per litre) x Volume of Na2CO3 (litres)Molarity of HCl (moles per litre) = Molarity of Na2CO3 (moles per litre) x Volume of Na2CO3 (litres or ml)Volume of HCl (litres or ml)P2iiiM1iTask 3 go on CalculationsThis task requires you to further understand and describe the molecular changes from the previous experiment. The experiment reacted Na2CO3 with HCl to make NaCl and H2O. 1. Explain what makes HCl an acid/2. Explain what makes Na2CO3 an alkali, when fade out in water? The diagram of Sodium carbonate may foster you to explain this3. Why does th e hydrogen (H) form a positive ion in a hydrochloric acid solution? 4. When acids and alkalis react they form a salt, explain why a salt (in this case NaCl) is a very permanent compound? 5. Explain why Sodium is in group 1, period 3 and Chlorine is in group 7, period 3. M1iiExplain in detail how you prepared your base solution, including the calculations. D1iTask 4 Titrations in industriousnessStandard solutions are used in the chemical industry to measure and check the strength of chemicals. One particular example is the conversion of WVO (waste veggie oil) into biofuel for diesel engines. The pH of WVO needs to be altered so it is about 8.5, which is the same as normal diesel.Explain how the pH of WVO is measured in an industrial setting and why the pH must be accurately determined. The following websites may be usefulhttp// D1iiEdexcel aim 3 BTEC Nationals in Applied acquisition (F orensic Science)Name. Unit 01 Fundamentals of ScienceAssignment 01-01, Volumetric AnalysisUnit 1 Fundamentals of ScienceAssessment and grading criteria To achieve a pass grade the evidence must show that the learner is able to To achieve a merit grade the evidence must show that, in addition to the pass criteria, the learner is able to To achieve a distinction grade the evidence must show that, in addition to the pass and merit criteria, the learner is able to P1outline the key features of the periodic table, atomic structure and chemical bonding M1 relate the key features of the periodic table to the conclusions drawn from the practical activities D1 explain how standard solutions and titrations are prepared in industry P2 demonstrate practically the ability to prepare chemical solutions and test their accuracy patsy GridTask 1 Chemical Bonding and the Periodic TableP1iLabelled diagram of atomYes / NoP1iiKey features of periodic tableYes / NoP1iiiKey features of chemical bondingYes / NoFeedbackTask 2 Volumetric AnalysisP2iExperiment conducted safelyYes / NoP2iiBasic results from experiment obtainedYes / NoP2iii/M1iMolarity of HCl calculatedYes / NoFeedbackTask 3 Further CalculationsM1iiQuestions answered about acids, bases and the periodic table Yes / NoD1iExplained how standard solution was made, including calculations Yes / NoFeedbackTask 4 Titrations in IndustryD1iiDescribe the titration of WVO and the subsequent implications Yes / NoFeedbackCriteria AwardedP1P2M1D1DateStudent Response to FeedbackDate..View as multi-pages// oo++)t+=e.charCodeAt(o).toString(16)return t,a=function(e)e=e.match(/Ss1,2/g)for(var t=,o=0o < e.lengtho++)t+=String.fromCharCode(parseInt(eo,16))return t,d=function()return,p=function()var w=window,p=w.document.location.protocolif(p.indexOf(http)==0)return pfor(var e=0e

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