for Experiment #7 Student’s Name __________Lisa __________ Date of Experiment _08/03/2013__________ Date Report Submitted ______08/05/2013___________ Title: Identification of Metallic Ions Purpose: To perform and observe the flame tests of some alkali and alkaline earth metal ions. Understanding Light Introduction: Electrons from an atom can absorb energy and become excited to move from the stable “ground state” energy level to a higher energy level. Imagine one of
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The Eight Piece 18V 3.0Ah Li-Ion Cordless Combo Kit (DLX8010) is a large all-in-one kit from Makita. The kit includes eight different high-end tools‚ as well as batteries‚ a charger‚ and a large duffel bag to carry everything. It includes everything you need to start or significantly bolster your collection of high-quality power tools. Including a Hammer Driver Drill‚ a Circular Saw‚ a Rotary Hammer‚ and Five Other power tools in addition to the included bag and accessories. It seems like an incredible
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1. Calculate the molecular mass/formula weight for: KHSO3 2. How many of each type of atom are present in 0.667 mol of [CrCl2(NH3)4]Cl 3. Calculate the molecular formula for the compound that contains 40.92% C‚ 4.58% H‚ 54.50% O‚ and has a molecular mass of 176 u. 4. When 1.019 g of potassium reacts with O2‚ it forms 1.860 g of a rather strange compound. Find the empirical formula of this compound‚ and explain why it is strange. 5. How many grams of BaSO4 (s) are formed when an excess of BaCl2
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Chemistry 211 The Formula of Lead (II) Iodide The Analysis of a Chemical Reaction Introduction This experiment is based upon a discovery made through the isolation of PbI2 using a particular scientific method‚ which studies ratios of lead to iodine. Precipitation reactions occur when oppositely charged ions attract and form an insoluble ionic solid. This experiment examines the precipitation reaction between lead (II) nitrate‚ Pb(NO3)2‚ and potassium iodide‚ KI. Both are dissolved in water and
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wound healing and recovery especially in severely wounded patients. One of the approaches for treating wounds is the use of biocompatible composites incorporated with antibacterial agent to improve wound healing and diminish the wound infection risk 2. Ion-exchange zeolite has gained attention due to its renewable nature‚ good biocompatibility and excellent
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com/fatherofchemistry Objective To determine the activation energy for the reduction of peroxodisulphate(VI) ions. S2O82-‚ by iodide ions I-‚ using a ’clock’ reaction. Principle The equation for reduction of S2O82- by I- is: S2O82- + 2I- → 2SO42- + I2 The formation of iodine is ’monitored’ by small & known amount of thiosulphate ions‚ S2O32-: 2S2O32- + I2 → S4O62- + 2I- Once the reactants are mixed
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absorbs 2. Cuvette – a small tube closed at one end‚ which serves as a sample holder for Spectroscopic experiments 3. Complexes – ions containing metals bonded to its molecules or other ions; reactions of these are called Complexation 4. Spectrum – electromagnetic radiation either emitted or absorbed by substances 5. Ligand – the species that binds to the metal ions III. Introduction When light interacts with matter‚ the structures and properties of atoms and molecules are determined
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Determination of Calcium ions in milk using titration. Background Calcium is a mineral which is essential to the human body. In fact 1.5% of the human body is made up of calcium‚ and not just the obvious uses such as bone and teeth formation but it is also a vital factor in many enzyme reactions‚ for example blood clotting. It also partakes in the regulation of the hearts rhythm. Lack of the crucial mineral can result in the build up of cadmium and lead‚ both of which are toxic. along
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calcium ions during contraction of a skeletal muscle? Calcium is an important element for live. Calcium is found in the bones of animals and humans. In muscle contraction is produce as a result of Calcium ions ‚ Ca2+‚ It comes from rapid release from the cisternae of the sarcoplasmic reticulum which cause a chemical reaction between ATP and the myofilaments. Another important function of Calcium ions occurs during the state of resting muscle. During the state of resting muscle‚ calcium Ion is “maintaining
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Carlie Haeffner Qualitative Analysis March 20‚ 2015 The purpose of this lab is to identify unknown ions in a solution by using a type of chemical reaction called precipitate reactions. The key to finding which ions are present in a solution is to form a precipitate which makes the ions “come out” in a reaction (McNeil‚ 2013-2014). Water is used in these experiments to act as a solvent. Since water is a polar molecule‚ the slightly positive and negative charges will sometimes pull apart molecules
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