data: TOTAL: CONCLUSION AND EVALUATION Conclusion Evaluation Improving the procedure TOTAL AIM: Experimentally determine the enthalpy change of the displacement reaction between zinc and copper sulphate. Zn (s) + CuSO4 (aq) Cu (s) + ZnSO4 (aq) Materials Required: 1M of CuSO4 Zinc powder Beaker Measuring Cylinder Thermometer Electronic weighing balance Spatula Thermometer Stop watch PROCEDURE: Measure 25cm3 of 1M of CuSO4 in
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-----------------1 Filter paper --------------------------------------------------------------------------------Several Stand and Clamp ---------------------------------------------------------------------------------1 Chemicals: Magnesium sulphate-7-hydrate--------------------------------------------------------------18g 2.0M ammonia solution-------------------------------------------------------------------500cm3 75% propanal-2-ol----------------------------------------------------------------------------20cm3
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Q. 1. What do you observe when ammonia gas is bubbled through red litmus solution? Q. 2. Write an equation for solutions of ammonium chloride and sodium hydroxide are heated. Q. 3.(i) What is the purpose of Haber’s Process ? (ii) Name the gaseous inputs of the Haber’s Process and state the ratio by volume in which the gases are mixed. (iii) What is done to increase the rate of reaction in the Haber Process ? (iv) Give two different ways by which the product can be separated from the reactants
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UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Ordinary Level CHEMISTRY Paper 1 Multiple Choice May/June 2005 1 hour Additional Materials: Multiple Choice Answer Sheet Soft clean eraser Soft pencil (type B or HB is recommended) 5070/01 w w w e tr .X m eP e ap .c rs om READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples‚ paper clips‚ highlighters‚ glue or correction fluid. Write your name‚ Centre number and candidate number on the answer
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annumL.) by Na2SO4 Salinity Sundas Zahoor‚ Hafza Abira Najam‚ Ummah Romana‚ Fatima Asghar Diyyal and Aqsa Nasir University of Gujrat‚ Gujrat‚ Pakistan Abstract: The present research was carried out to evaluate response of chili plants to sodium sulphate (Na 2So 4) salinity. There were three levels of Na2SO4 including control i.e. 0‚ 30and 60ppm. Experiment was laid down in completely randomized design (CRD) with three replicates. The result showed that the plants have no treatment of salinity
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The chemical equation for this reaction is: CuSO4(aq) + BaCl2(aq) → BaSO4(s) + CuCl2(aq) Copper sulphate is harmful if swallowed and is also dangerous for the environment. It can be extremely toxic for aquatic organisms‚ so finding it in soil can be alarming‚ especially if it is in large quantities. I have found that unknown sample B iron(iii) sulphate. I have identified it to be iron as it gave a yellow colour during the flame test narrowing it down to be barium or iron(iii)
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MATERIALS : METALS AND NON-METALS Y Iron Coal ou are familiar with a number of materials like iron‚ aluminium‚ copper‚ etc. Some materials have been given in Table 4.1. Table 4.1 : Appearance and Hardness of materials Object /Material Appearance Hardness (Shiny/Dull) (Very hard/ Not very hard) similar change if we try to beat a wood log ? Let us find out. Activity 4.1 Take a small iron nail‚ a coal piece‚ a piece of thick aluminium wire and a pencil lead. Beat the iron nail with
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Aim: To examine a number of different chemical reactions and determine if they are exothermic or endothermic. Apparatus: • Test tubes {Around 10-12 in number} • Test-tube rack • Spatula • Digital thermometer { ± 0.1° C} • Digital balance {± 0.01 g} • Measuring cylinder {± 0.5cm³} • Different chemicals Introduction/Theory: Exothermic reactions are those reactions that release energy in the form of heat. Endothermic reactions need to absorb energy in the form
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Q. 1. During the electrolysis of molten lead bromide‚ which of the following takes place : A : Bromine is released at the cathode. B: Lead is deposited at the anode. C : Bromine ions gain electrons. D: Lead is deposited at the cathode. Ans : - D. Q. 2. Here is an electrode reaction : Cu → Cu2+ + 2e-. [i.e. Cu- 2e- →Cu2+]. At which electrode(anode or cathode) would such a reaction take place. Is this an example of oxidation or reduction. Ans : - At anode. Oxidation. Q. 3. A solution contains
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aluminium oxide and water 2. Iron (iii) oxide reacts with carbon forming iron and carbonmonoxide 3. Hydrogen peroxide reacts with lead sulphide forming lead sulphate and water 4. Lithium reacts with nitrogen forming lithium nitride 5. Nickel sulphate reacts with sodium phosphate to form nickel phosphate and sodium sulphate 6. Silver oxide reacts with hydrogen peroxide to form silver ‚ water and oxygen 7. Ammonia combines wuth oxygen to get nitrogen oxide and water 8. Aluminium
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