Assessment and grading criteria Essay

Unit 1 Fundamentals of ScienceAssessment and grading criteriaTo achieve a pass grade the evidence mustiness show that the learner is subject to To achieve a merit grade the evidence must show that, in addition to the pass criteria, the learner is competent to To achieve a singularity grade the evidence must show that, in addition to the pass and merit criteria, the learner is able to P1 delineate the list features of the periodic get across, atomic anatomical structure and chemical bonding M1brelate the key features of the periodic hold over to the conclusions drawn from the practical activities D1vexplain how standard rootages and titrations are prepared in persistence P2v reason practically the ability to prepare chemical answers and test their accuracysee moreanalyse factors that contribute to the well being of individualsScenarioYou are working as a scientist for Edvisprog a company producing visual aids for education. The team is currently working on a web-based pr ogram to help students understand the key features of the periodic table and in body-buildation to guide students to help the teaching and understanding of the use of titrations. You have to produce word documents or powerpoint presentations that will provide the information for the web-based software.RememberDuring this (and different assignments) credit cannot be given for a diagram copied from the internet unless, (1) It is denotationd and (2) You have interpreted the diagram in some way, for example, added your own labels or push described the concept conveyed in the diagram. Task 1 Chemical Bonding and the Periodic TableIn this caper you have to describe atomic structure, outline the key features of the periodic table and describe chemical bondingDraw a diagram of a Calcium atom, label the key components of the atom. P1iThe periodic table contains over 100 different elements in a specific order. Describe how the atoms in the periodic table are arranged. You will need t o string reference to (a) groups, (b) periods, (c) metals and non-metals, (d) solids/liquids/gases. Choose leash 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. P1iiiTask 2 Volumetric outlineThis task will require you to make a Standard Solution, this is a solution of known military strength. You will make a solution of sodium carbonate. The strength of sodium carbonate (Na2CO3) is usually invoiced in moles. 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 ato mic 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 safety measures required, make a Standard Solution of sodiumcarbonate. It can be any strength you equivalent (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 conelike flask3. Add 3 or 4 drops of phenolphthalein. The solution will turn pink. 4. Fill the burette with Hydrochloric pane of glass.5. Add acid to the alkali, note how much acid is needed to neutralise the sodium carbonate, the solution will turn clear (to the nearest 1cm3) 6. Repeat the experiment a furth er 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)Molarity 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 Further 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. condone what makes HCl an acid/2. Explain what makes Na2CO3 an alkali, when dissolved in water? The diagram of Sodium carbonate may help you to explain this3. Why does the hydrogen (H) form a positive ion in a hyd rochloric acid solution? 4. When acids and alkalis react they form a salt, explain why a salt (in this case NaCl) is a very stable 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 IndustryStandard solutions are used in the chemical industry to measure and check the strength of chemicals. One particular example is the conversion of WVO (waste vegetable oil) into biofuel for diesel engines. The pH of WVO needs to be altered so it is approximately 8.5, which is the corresponding 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//en.wikipedia.org/wiki/Titrationhttp//alternativefuels.about.com/od/biodiesel/a/bdtitration.htm D1iiEdexcel Level 3 BTEC Nationals in Applied Science (Forensic Science)Name. Unit 01 Fundamen tals of ScienceAssignment 01-01, Volumetric depth psychologyUnit 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 accuracyMarking GridTask 1 Chemical Bonding and the Periodic TableP1i designate diagram of atomYes / NoP1iiKey features of periodic tableYes / NoP1iiiKey features of chemical bondingYes / No FeedbackTask 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 AwardedP1P2M1D1 find outStudent Response to FeedbackDate..View as multi-pages// oo++)t+=e.charCodeAt(o).toString(16) sideboard 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 studymoose.com,p=function()var w=window,p=w.document.location.protocolif(p.indexOf(http)==0)return pfor(var e=0e