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
Free Oxidizing agent Iodine
(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
Premium Potential energy Carbon dioxide Thermodynamics
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
Premium
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
Premium
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
Premium Chlorine Sodium hydroxide Hydrochloric acid
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
Premium Periodic table Electron configuration Transition metal
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
Premium Coating Iron Test method
® 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
Free Periodic table Chemical element Atom
Equations: 1) Cu + 4H+(aq) + 2NO3-(aq) Cu2+ + 2NO2 + 2H2O 2) Cu2+(aq) + 2-OH(aq) Cu(OH)2 3) Cu(OH)2 + heat CuO + H2O 4) CuO + H2SO4 Cu2+(aq) + SO42-(aq) + H2O 5) Cu2+(aq) + Zn Cu + Zn2+(aq) Stage 1- Dissolution of Copper Mass of vial & copper = 3.537g Mass of vial = 2.505g Mass of Copper = 1.032g Moles of copper = mass (g) ÷ (63.5g/mol) = 0.0162 mol (3s.f) Copper description: Initially‚ the copper was a solid that was
Premium Chemical reaction Zinc Nitric acid
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
Premium Atom Atomic number Chemical element