10.0 EXPERIMENT ON DETERMINATION OF DISSOLVED OXYGEN Sl. No. Contents Preamble 10.1 Aim 10.2 Introduction 10.2.1 Environmental Significance 10.3 Principle 10.4 Materials Required 10.4.1 Apparatus Required 10.4.2 Chemicals Required 10.5 Sample Handling and Preservation 10.5.1 10.6 Precautions Procedure 10.6.1 Preparation of Reagents 10.6.2 Testing of Water Sample 10.7 Calculation 10.7.1 Table 10.7.2 Data Sheet 10.8 Interpretation of Results 10.9 Inference 10.10 Evaluation
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Candidate name…………………………………………………………………….. MINISTRY OF EDUCATION MASALA SECONDARY SCHOOL BOARD MOCK EXAMINATION 2014 SCIENCE 5124/3 PAPER 3 (CHEMISTRY) 1hour 15minutes Additional materials: Monday 30th July 2014. Answer paper INSTRUCTIONS TO CANDIDATES Write your name‚ centre number and candidate number at the top of this page all separate Attempt all questions in SECTION A and only TWO questions in SECTION B SECTION A (45 marks)
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Chemistry IGCSE Paper 6 revision guide You can change the temperature and concentration used (not both at the same time though) You need to keep the diameter of the conical flask the same‚ if it is thinner then the cross will disappear sooner‚ the cross also has to be the same‚ volumes too (This set up is mostly if you want to test the gases‚ otherwise you can use the standard set up) The limestone cycle: 1. Burn the limestone
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AIM TO STUDY THE VARIATION OF CONDUCTANCE WITH CHANGE IN DISTANCE‚MOLARITY AND TEMPRATURE. CERTIFICATE I have the pleasure to certify that RAGHUVANSH SINGH BHALLA student of class XII (Science) of J.D. Tytler School has persuade his work and prepared the dissertation on the topic. To study the variation of conductance with change in distance‚ molarity and temperature . Under my supervision and guidance‚ this is being submitted for
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Surname Centre No. Initial(s) Paper Reference 4 3 3 5 Candidate No. 2 H Signature Paper Reference(s) 4335/2H Examiner’s use only London Examinations IGCSE Team Leader’s use only Chemistry Paper 2H Higher Tier Wednesday 17 June 2009 – Morning Time: 2 hours Materials required for examination Nil Items included with question papers Nil Question Leave Number Blank 1 2 3 4 5 6 7 8 9 Instructions to Candidates In the boxes above‚ write your centre number‚ candidate number‚ your surname
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MAKING SALTS. AIM: In this experiment the aim was to get Copper Carbonate to react with Sulphuric Acid to get Copper Sulphate. EQUIPMENT USED: o 5 Grams of Carbon Carbonate o Weighing Boat‚ Spatula & Scales o 25 cm³ Sulphuric Acid o Beaker o Tripod and Gauze o Bunsen burner‚ Splint and Matches o Filter Funnel and Filter Paper o Conical Flask o Glass Dish RISK ASSESSMENT: o Sulphuric Acid – Corrosive o Safety Glasses and Lab Coats to be worn o Any Spillage‚ dilute with water
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Surname Centre No. Initial(s) Signature Candidate No. Paper Reference(s) 4335/1F Examiner’s use only London Examinations IGCSE Team Leader’s use only Chemistry Paper 1F Foundation Tier Monday 9 May 2005 – Morning Time: 1 hour 30 minutes Materials required for examination Nil Items included with question papers Nil Question Leave Number Blank 1 2 3 4 5 6 7 8 9 Instructions to Candidates In the boxes above‚ write your centre number and candidate
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Write up for Qualitative Analysis 1. Introduction- This experiment is for qualitative analysis so we are trying to find out what is in a substance. In this case we are using the flame test to try and discover what is in 4 unknown sample solutions that we have been given this is done by cross referencing the colour of the flame with 6 known solutions we test beforehand. Aim- In this experiment we are attempting to distinguish what substances are in the 4 unknown solutions by cross referencing
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Gel filtration chromatography on Sephadex G-50 The crude broth obtained after fermentation was subjected to ammonium sulphate precipitation at 70% (w/v). The pellet so obtained was resuspended in cold saline (2 ml) and dialysed. The dialysed enzyme was loaded onto a column of Sephadex G-50 (120 cm × 1.0 cm) equilibrated with 10 mM Tris-HCl buffer‚ pH 8. The column was eluted at a flow rate of 1 ml / 6 min. The elution profile of gel filtration chromatography is shown in the (Fig: 1). The fractions
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copper in your antique brass sample. G621: Analysis at Work – Sample Assignment C Finding the Percentage of Copper in a Brass Alloy Technicians’ Guidance: Please read this guidance before issuing the practical. Calibration • Copper sulphate 0.1 mol dm-3 can be used – as indicated in experimental details Assignment C. • However‚ Cu(NO3)2 (aq) rather than CuSO4 could be used in the calibration in case of a colour difference of the hydrated copper ions in the two solutions. Antique
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