Unit 1: Unit code: QCF Level 3: Credit value: Fundamentals of Science R/502/5536 BTEC National 10 Guided learning hours: 60 Aim and purpose The aim of this unit is to enable learners to develop the practical techniques necessary to pursue a career as a laboratory technician. Learners will investigate the quantities necessary in chemical reactions‚ the structure and functions of cells‚ the calorific value of different fuels and develop skills in communicating scientific information. Unit
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25 nm until reaching 950 nm. We then found our wavelength at which A is a maximum and repeated measuring every 5 nm. We then diluted our solution further using a pipette adding 20 ml‚ 10 ml‚ and 5 ml to three separate 25 ml volumetric flask and diluted to the calibration line and swirled vigorously. We then measured the absorbance of wavelength of each vial. We then weighed out 2.0255 g of the unknown (#75) ore sample and made the same solution as above in the electrolytic analysis of Cu in an
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In this practical the aim was to determine the concentration of Na2CO3 in a standard solution‚ by using Hydrochloric acid to neutralise it. This experiment involved using distilled water to dissolve the sodium carbonate until 250 ml of solution were made. I had to calculate‚ from the information provided‚ how much sodium carbonate to use in the making of the solution. Using the volume and concentration of the solution‚ I was able to calculate the moles of the solution (concentration x volume). Using
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Filter contents with cheesecloth. Reagents Reagent A: Prepared by adding 1mL of Folin-Ciocalteau Phenol Reagent to 39mL of distilled water. Solution A: Buffered copper solution Prepared by adding the following to 80mL of distilled water in a 100mL volumetric flask: 1 mL glacial acetic acid‚ 23.2 g NaCl‚ 3.2 g sodium acetate The solution is well mixed to dissolve all components‚ and 0.5g of CuSO4 is added‚ mixed again‚ the pH adjusted to 4.8 with the addition of NaOH solution‚ mixed again‚ and distilled
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Making Molar Solutions and Dilutions Objectives: After performing this lab‚ the student should be able to: • Calculate grams of solute and correctly prepare a molar solution. • Prepare parallel and serial dilutions using C1V1 = C2V2 • Distinguish a parallel dilution from a serial dilution. • Determine whether a parallel or serial dilution should be used in a given situation. • Use a microcentrifuge to make a pellet. Making Molar Solutions and Dilutions A major job of any biotechnician
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References: The Essentials of Volumetric Analysis 2nd Edition by John Lambert Laboratory Manual for Chemistry by Chemical Education Material Study Practical Chemistry 3rd Edition by John Lambert Quantitative analysis and Chemical Calculations by E. N Lambert and M. J Mohammed
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Task 3 – D Why is it important for all laboratory procedures and practices to be followed and communicated through the team? Chemical Store management – it is vital for chemical storage procedures to be followed as the potential risks that can result from using and handling chemicals can be very high. For example; mishandling of citric acid (even though it is a low risk chemical) could result in contact with the skin and/or eyes which may cause irritation‚ miscommunication between the staff could
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Red litmus paper 2 × small funnels 250 mL volumetric flask 3 × 250mL conical flask 20mL pipette Pipette filler 5 mL measuring cylinder Burette and stand Spatula White tile Electronic heater Bench mat Safety glasses 3. Procedure 1) Accurately weigh about 1.3g of fertiliser. 2) Transfer the sample of fertiliser to a 250mL volumetric flask. Rinse the weighing bottle with a bit of distilled water and add this to the contents of the volumetric flask. Add more water until the flask is almost
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Aspirin Background Aspirin Aspirin‚ or acetylsalicylic acid (ASA) is a salicylate drug‚ and is generally used as an analgesic (something that relieves pain without producing anaesthesia or loss of consciousness) for minor aches and pains‚ to reduce fever (an antipyretic)‚ and also as an anti-inflammatory drug. Aspirin works by prohibiting biological substances such as prostaglandins. Many different prostaglandins exist in the human body each serving a plethora of physical functions.
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Modbury High School SACE Stage 1 Chemistry Topic 5 Mole Concept and Stoichiometry Assignment 5: Volumetric analysis (titrations)‚ stoichiometry SOLUTIONS Note: Write answers neatly and legibly in your exercise book or on pad paper. ALWAYS include a title and name for your work and clearly indicate each answer. 1. a) 23.08 and 23.00 mL are concordant titre values. Average titre = (23.08 + 23.00) = 23.04 mL 2 b) Ca(OH)2
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