solution. (2) For example in this experiement‚ the analyte that was used was copper in the form of CuSO4•H2O. It was strong enough to oxidize iodide ions to Iodine. The analyte was needed to be isolated‚ and we did this by precipitating it out of the solution. To precipitate out Cu (II) ions‚ NH3 was added dropwise – this is to avoid having an excess amount of NH3 in the solution which would form [Cu(NH3)4]2+that could interfere with the reduction of Cu2+and could change the pH of the solution that
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(well‚ it is chemical potential energy to be precise. Concentration gradient is not sufficient condition for diffusion.) Interdiffusion • Interdiffusion: In an alloy‚ atoms tend to migrate from regions of large concentration. Initially Cu 100% 0 After some time Ni 100% Concentration Profiles 0 Concentration Profiles DIFFUSION MECHANISMS Substitutional diffusion and interstitial diffusion (1) Substitutional (Vacancy) Diffusion: • applies to substitutional impurities
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Flame Tests The flame testing is a method used in chemistry to detect the presence of certain ions‚ primarily metal ions‚ based on each element’s characteristics emission spectrum. The colour of the flames normally depends on the temperature. Different types of Bunsen burner with flame types depend on the oxygen supply. The flame of rich fuel with no premixed oxygen produces a yellow diffusion flame. The flame of lean fully oxygen premixed flame produces no soot and the flame colour is produced
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publishers: niche of truth kalabhavan road‚ cochin- 18 first edition : april 1999 second edition: november 2001 typesetting : creative media cover : yoonus printing: anaswara‚ cochin Cu temIØns\mcp {kjvSmhp≠v˛ Poh≥ \¬In hmbphpw sh≈hpw kuIcys∏SpØn `qansb PohnXtbmKyam°nb ]caImcpWnI\mb {kjvSmhv. \mw ChnsS Fßs\ Pohn°Wsa∂pw Cu PohnXØns≥d ]cae£yw Fs¥∂pw ZqX∑m¿ aptJ\ {kjvSmhv \sΩ ]Tn∏n®p. \ΩpsS PohnXØns≥d IW°v acWtijw \mw {kjvSmhns≥d apºn¬ t_m[n∏nt°≠nhcpw. A∂v ]pWyw sNbvXh\v \∑bpw ]m]w sNbvXh\v Xn∑bpw {]Xn^ew
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when a dilute acid reacts with a metal. What happens when a burning candle is brought near this gas? Q5. What are the products obtained on heating NaHCO3. Write the chemical equation for the reaction involved in the above. What is the colour of CuSO4 crystals before heating and after heating the crystals? What is meant by water of crystallization of a substance? Describe an activity to show that copper sulphate crystals contain water of crystallization. Q6. Q7. Q8. Q9. What is baking power
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d- Block elements are collectively known as Transition Elements because properties of these elements vary in between s-Block and p-Block elements. A transition element should have partially filled (n-1) d orbital. Group 12 elements i.e. Zn‚ Cd‚ Hg have completely filled (n-1) d-orbital in atomic & ionic state & thus these elements are considered as Typical Transition Elements. All these elements are metals. They are less electropositive than s-block elements & more electropositive
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® Copying is permitted according to the Site Licence Conditions only keep it simple science Preliminary Chemistry Topic 2 METALS What is this topic about? To keep it as simple as possible‚ (K.I.S.S.) this topic involves the study of: 1. OUR USE of METALS 2. CHEMICAL ACTIVITY of the METALS 3. PATTERNS of the PERIODIC TABLE 4. QUANTITY CALCULATIONS... the MOLE 5. METALS from their ORES ...all in the context of how Chemistry contributes to cultural development but first‚ an introduction
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definite geometry of the coordination compound. (iii) Primary valencies are usually ionizable‚ while secondary valencies are non-ionizable. Question 9.2: FeSO4 solution mixed with (NH4)2SO4 solution in 1:1 molar ratio gives the test of Fe2+ ion but CuSO4 solution mixed with aqueous ammonia in 1:4 molar ratio does not give the test of Cu2+ion. Explain why? = Both the compounds i.e.‚ and fall under the category of addition compounds with only one major difference i.e.‚ the former is an example
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www.steelwirechina.com BRITISH STANDARD BS EN 10244-1:2009 Steel wire and wire products — Nonferrous metallic coatings on steel wire Part 1: General principles ICS 25.220.40; 77.140.65 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW www.steelwirechina.com BS EN 10244-1:2009 National foreword This British Standard is the UK implementation of EN 10244-1:2009. It supersedes BS EN 10244-1:2001 which is withdrawn. The UK participation in its preparation
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135 grams of Aluminum. Molar Mass of Aluminum = 26.98g/mol # moles Al = 135g x 1 mole = 5.0 moles 26.98g B. 1.0 grams of Copper. Copper Molar Mass = 63.55g/mol # moles Cu = 1.0g x 1 mole = 0.016 moles 63.55g 5. Convert the following moles into masses. A. 0.160 moles of Magnesium. Mg Molar Mass = 24.31g/mol
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