Introduction: In investigation 14‚ “What Factors Affect Chemical Equilibrium?”‚ the purpose was to find out which reagents caused a change in the chemical equilibrium. A deep red color was formed when Iron Nitrate [Fe(NO3)3 (aq)] was mixed with water and Ammonium Thiocyanate [NH4NCS (aq)]. The product of these two reactants was Iron Thiocyanate(FeNCS). After different trials of mixing the given reagents with the Iron Thiocyanate and changing the temperature‚ a new equilibrium was reached
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Chemistry Name _________________________________ Period ___ Date __/__/__ 4 Reactions in Aqueous Solution Precipitate Practice #1 Write balanced molecular and detailed ionic equations. Strike out any spectator ions. 1. Solutions of lead nitrate and potassium chloride are mixed. Pb(NO3)2(aq) + 2 KCl(aq) PbCl2(s) + 2 KNO3(aq) Pb2+ + 2 NO3- + 2 K+ + 2 Cl- PbCl2(s) + 2 K+ + 2 NO3- 2. Solutions of sodium sulfate and calcium bromide are mixed. Na2SO4(aq) + CaBr2(aq)
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IGCSE Chemistry 2012 exam revision notes by Samuel Lees Contents: 1. The particulate nature of matter 2. Experimental techniques 2.1 Measurement 2.2 (a) Criteria of purity 2.2 (b) Methods of purification 3. Atoms‚ elements and compounds 4.1 Atomic structure and the Periodic Table 4.2 Bonding the structure of matter 3.2 (a) Ions and ionic bonds 3.2 (b) Molecules and covalent bonds 3.2 (c) Macromolecules 3.2 (d) Metallic bonding 3 Stoichiometry 4
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URALCHEM reports the results of the Annual General Meeting of Shareholders United Chemical Company URALCHEM‚ OJSC reports on the decisions taken by the shareholders at the Annual General Meeting held on 30th June‚ 2014. Moscow‚ Russia (July 2‚ 2014) -- United Chemical Company URALCHEM‚ OJSC reports on the decisions taken by the shareholders at the Annual General Meeting held on 30th June‚ 2014. The company’s shareholders approved URALCHEM’s annual report and annual financial statements for
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ensure my results were clear‚ I decided to evaporate my unknown on the second lab day to test for my unknown with a dry sample. After my unknown was evaporated‚ I could use my dry sample for the first three tests‚ the Flame Test‚ Bead Test‚ and Cobalt Nitrate test. As I moved the chromel wire with my dry unknown through the flame for the Flame Test‚ the results were indicative of Calcium. The dry sample of my unknown had a dark orange flash color and the liquid solution was bright orange. To ensure my
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Chemical Reactions and their Classifications 26 October 2012 Abstract: Ordinary laboratory ware was used to determine how many of what type of chemical reactions occurred. This yielded three decomposition reactions‚ four substitution reactions‚ and three metathesis reactions. Introduction There are many different types of chemical reactions in the study of chemistry; A composition reaction (also known as synthesis) is defined as the reaction that occurs when two single compounds combine in
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8 drops of hydrochloric acid to the anion solution. Note the appearance of the solution plus any evolution of gas and odors of gas. 5. Second test tube: a. Put 8 drops of the anion solution in a second test tube. b. Add 3 drops of silver nitrate solution. c. Note the colors of any precipitates formed. d. Write a net ionic equation for any reaction that produces a precipitate. e. Acidify the test tube by adding a few drops of nitric acid. f. Mix well and note if the precipitate dissolves
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Unit 3 assessment O1 Analysis of fertiliser-an extended experimental investigation Background: In this investigation you will analyse the composition of a lawn fertiliser‚ or ‘lawn food’. You may use external sources to help you complete the this section. Q1. Why is each of the elements Nitrogen‚ Phosphorus‚ sulfur and iron included in lawn food? ______________________________________________________________________________________________________________________________
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Cycles in Biology Cycles in biology play a fundamental role in the world that we live in. Cycles occur all around and inside of us in many different forms‚ from the Krebs to the Calvin cycle. There are large scale cycles happening and they are essential in regulating the nutrients and substances that are around us which without‚ life on earth could no function. One of the largest cycles that occurs all around us is in everyday life is the carbon cycle. The current atmospheric
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A report on [pic] Of[pic] [pic] INTRODUCTION Mushroom gives highest profit in terms of per hectare. At present 3 mushrooms are being cultivated in India. These are: the white mushroom (Agaricus bisporus)‚ the paddy-straw mushroom (Volvariella vovvacea) and the oyster mushroom (Pleurotus sajor-caju). Of these‚ A. bisporus is the most popular and economically sound to grow and is extensively cultivated throughout the world. However‚ due to its low temperature requirement‚ its cultivation
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