The Effect of Molecular Weight and Time on the Diffusion Rate of Potassium Permanganate‚ Potassium Dichromate‚ and Methylene Blue.1 Arantxa Alex Carpio Group 1 Sec. X – 4L March 24‚ 2015 ABSTRACT The effect of molecular weight and time on the rate of diffusion was determined using the agar-water gel test. A petri dish of agar-water gel with three wells was prepared and a prepared solution of each substance was dropped on each well; one with potassium permanganate (KMnO4)‚
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Manufacture of Ammonia and its salts 1. State uses of ammonia in daily life. -To make explosive chemicals such as TNT -In the rubber industry‚ ammonia is used to prevent the cogalation of latef 2. State physical properties of ammonia. -Ammonia‚(NH₃) is a colourless and pinyentgas -It is less dense than air -It is highly soluble in water. NH₃ + H₂O NH₄OH 3.The diagram below show ]s a flow chart to prepare nitric acid and fertiliser Z from ammonia. Ammonia Ammonia Fertiliser
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Humankind is largely fed by food grown with synthetic chemical fertilizer and by explosives like Dynamite. Synthetic fertilizer requires a plentiful supply of nitrogen‚ inventing a process to fix it in ammonia was daunting. Attempts were made for over 100 years. Then in 1909 Fritz Haber‚ a German chemist‚ solved the problem in principal. In 1910‚ Carl Bosch‚ pioneering new engineering methods‚ commercialized the process. Known as the Haber-Bosch Process‚ it is now responsible for growing about half
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be available to slip under the well as the student observes the changes that are occurring. As each reaction occurs‚ record the well number and observations. 1. Sodium Bicarbonate + Hydrochloric Acid 2. Hydrochloric Acid + Bromothymol blue 3. Ammonia + 1 drop Bromothymol blue 4. Hydrochloric acid + blue dye 5. Blue dye + Sodium Hypochlorite. Observe & add 1 drop of hydrochloric acid. 6. Potassium iodide + Lead Nitrate. A precipitate should form. 7. Sodium hydroxide + phenolphthalein. a.
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NaOH solution to the solution of the sample and look for a precipitate. 5.) Add excess NaOH solution and look for the precipitate re-dissolving. 6.) If no precipitate is formed‚ heat the test tube gently over a Bunsen’s flame and test for Ammonia by using a universal pH paper 7.) Record relevant observations. 8.) If the precipitate is white in color and is soluble in excess NaOH then carry out procedure 9. 9.) Repeat procedures 3 to 7 with NH4OH and record relevant observations
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H2 Chemistry 9647 Term 3 Block Test 2010 – Examiner’s report H2 CHEMISTRY 9647 Paper 2 (Section A) Structured Questions Question 1 – Atomic Structure and Redox Titration Most elements exist in nature as mixture of isotopes. At present‚ there are about 1600 known isotopes‚ of which only one-sixth are stable. The unstable isotopes lose energy by emitting ionising particles or radiation through the process of radioactive decay. Ernest Rutherford and later Paul Villard discovered the three
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Part 1 A） Chemist 1: New product development This career role involves the development of new paints to meet changing market needs. The chemist would be working as a member of a team developing and testing new colloidal paints to suit specific purposes. This might include weatherproof paints‚ which retain their colour and are resistant to solar radiation‚ or indoor paints that can be easily and repeatedly washed. Chemist 2: Environmental monitoring This career role as a public servant could
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Sign 1 Estimation of COD of the given sample of water. 2 Estimation of Manganese in the given pyrolusite ore. 3 Estimation of Magnesium by EDTA method. 4 Estimation of purity of drug using pH meter. 5 Estimation of Ammonia in ammonium salts. 6 Polarimetric estimation of sugar CYCLE TWO Date of Condn. Date of Subn. Sign 7 Estimation of Phosphorous in the mixed sample. 8 Estimation of Sugar by Lane-Eynon method. 9 Estimation of acid
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Acids and Bases Mirza Hasan Mammadov Acids and bases are really important in our daily day life. So let’s start with telling the definitions of them. Starting with acids‚ they are a substance which dissociates in water in order to produce one or more hydrogen ions. Also we can write H+ instead of hydrogen ion. Bases have the same definition‚ although the difference is that it firm hydroxide ions instead of hydrogen ions. We can write OH- instead of hydroxide ion. All alkali is bases but not
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Preservative) * 18 Panadol 6 tablets “Panadol Rapid – Soluble” (Effervescent Tablets with Sodium Bicarbonate for accelerated digestion) * 1.8L distilled water (neutral solvent) * 1.8L bottled lemon juice (acidic solvent) * 1.35L cloudy ammonia (basic solvent) * 0.45L distilled water (basic solvent dilution) * 2 small saucepans * Stove * Permanent marker Method Neutral Solvent 1. Wipe thermometer with ethyl alcohol swab to sterilise 2. Boil 600mL distilled water
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