sheet of paper. 4) Which element is oxidized and which element is reduced in the following reaction? Slect your reaction Zn(s) + 2 HCl(aq) Zn is oxidized (0 Fe2O 3(s) + 2 Al(s) Fe is reduced (3+ ZnCl 2(aq) + H 2(g) 2+) and H is reduced (+1 ÷ 0) 2 Fe(s) + Al2O 3(s) 0) and Al is oxidized (0 ÷ 3+) 14 HNO3 + 3 Cu2O 6 Cu(NO3)2 + 2 NO + 7 H2O N is reduced (5+ 2+) and Cu is oxidized (1+ ÷ 2+) I–– + 2 MnO4– + H2O IO3– + 2 MnO 2 + 2 OH–– I is oxidized (1–– 5+) and Mn is reduced (7+ ÷ 4+) MULTIPLE
Premium Mole Chemical reaction Sodium hydroxide
Sulphate ZnSO4 = 65 + 32 + (16 x 4) =161 * Mass of water in 1 mole of ZnSO4 = Mr ZnSO4 x Mass of water Mass of anhydrous salt * Mas of water in 1 mole of ZnSO4 = 161 x 5.79 = 129.29 7.21 * Moles of water in 1 mole of ZnSO4 = Mass of water in one mole of ZnSO4
Premium Sulfuric acid Measurement Zinc
9.1 Manufacture of Sulphuric Acid 1. State uses of sulphuric acid in daily life. - lead acid batteries in automobiles and for home use - extraction of elements from ores - manufacturing of fertilizers 2.The following shows an incomplete flow chart of the Contact process. a) b)Chemical equation A. B. C. D. 3. Briefly explain the sources of sulphuric dioxide gas in atmosphere. -Sulphur dioxide is produced mainly from the combustion of fossil fuels
Premium Glass Sulfuric acid Ammonia
Regd. Office : Aakash Tower‚ Plot No.-4‚ Sec-11‚ MLU‚ Dwarka‚ New Delhi-110075 Ph.: 011-47623456 Fax : 011-47623472 Admission-cum-Scholarship Test (Sample Paper) (Nurture 9X Classroom Course-2015) (Syllabus of the Test : Science & Mathematics of Class VIII) Roll No.: ____________ Test Booklet Code : Time : 1½ Hrs. A Max.Marks : 240 INSTRUCTIONS TO THE CANDIDATES 1. The initial 10 minutes are earmarked for the candidates to carefully read the instructions. (Note : The candidates are not allowed
Premium Christopher Nolan
CHEMISTRY PRACTICAL NOTES - SALT ANALYSIS S.No. | EXPERIMENT | OBSERVATION | INFERENCE | 1(a) | Noted the colour of the salt | BluePale greenGreenPale pinkColourless | May be Cu2+May be Fe2+May be Ni2+‚ Cu2+May be Mn2+Absence of Cu2+‚ Fe2+‚ Ni2+‚ Cu2+‚ Mn2+ | (b) | Noted the physical state of the salt | (i)Amorphous(ii)crystalline | May be CO32-May be Cl-‚ Br-‚ SO42-‚ NO3- | 2 | Action of heat:The given salt is heated in a dry test tube. | (i)Reddish brown vapours(ii)Crackling sound(iii)Yellow
Premium Ammonia Sodium hydroxide Solubility
Design Lab Experiment: How would an increase in the atomic radii of the metals in period 4 affect the time it takes for a metal to react with HCl. Hypothesis: If Hydrochloric Acid is dropped on all of the metals in period 4‚ then the elements with the largest atomic radii will react faster with Hydrochloric Acid because atoms with bigger atomic radii are
Premium Hydrogen Chemical element Atom
Waste Management 23 (2003) 61–88 www.elsevier.com/locate/wasman Management of municipal solid waste incineration residues T. Sabbasa‚ A. Polettinib‚*‚ R. Pomib‚ T. Astrupc‚ O. Hjelmard‚ P. Mostbauera‚ G. Cappaie‚ G. Magelf‚ S. Salhofera‚ C. Speiserg‚ S. Heuss-Assbichlerf‚ R. Kleinh‚ P. Lechnera (members of the pHOENIX working group on Management of MSWI Residues) BOKU University Vienna‚ Department of Waste Management-Nussdorfer La¨nde 29-31‚ A-1190‚ Vienna‚ Austria University of Rome ‘‘La Sapienza’’
Free Waste management Waste Biodegradable waste
Chemical Equilibrium J.R. Chua2 and I.G. Mejarito2 1Department of Mining Engineering‚ College of Mining Metallurgical and Materials Engineering University of the Philippines‚ Diliman‚ Quezon City‚ Philippines 2Department of Molecular Biology & Biotechnology‚ College of Science Date Performed: April 22‚ 2013 Instructor: Julius Victorius A. Saluria Discussion The laws of chemical equilibrium define the direction in which a chemical reaction will proceed‚ as well as the quantities of
Premium Chemical reaction Solubility
SYLLABUS CHEMISTRY (043) CLASS-XII – (2012-13) Annexure - ‘ I ’ S.No. 1. 2. 3. 4. Type of Question Long Answers (LA) Short Answers-II (SA II) Short Answers-I (SA-I) Very Short Answer (VSA) Total Marks for No. of Total Marks each Question Questions 5 3 2 1 3 9 10 08 30 15 27 20 08 70 Weightage 4 5 5 5 4 3 8 5 3 4 4 6 4 4 3 3 70 Total: S.No. UNIT 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. Solid State Solutions Electrochemistry Chemical Kinetics Surface Chemistry General Principles
Premium Chemistry Chemical reaction Reaction rate
SYNTHESIS AND CHEMISTRY OF K2S2O8 ABSTRACT In this experiment‚ a sample of K2S2O8 was prepared by the electrolysis of an aqueous solution of H2SO4 and K2SO4. The peroxodisulfate anion‚ S2O82-‚ was also observed for its ability to serve as a counterion for precipitation by preparing a copper (II) complex by reacting hydrated copper (II) sulfate with ammonium peroxodisulfate in the presence of pyridine. This same ability‚ coupled with its strong oxidizing ability allowed for stabilization of
Premium Chemistry Electrochemistry Oxygen