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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unwanted products of metabolism and of substances present in excess within the organism. Animals excrete nitrogenous waste products such as ammonia‚ uric acid or urea. These or similar products to that produced by the deamination of any excess protein that has been eaten as nitrogenous compounds are formed in metabolism of proteins and nucleic acids. Ammonia is lost by diffusion from small aquatic organisms but more complex animals such as mammals rely on kidneys to filter wastes out of the blood
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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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|8 – 9 | |(B) Ammonia and its salt | | |Manufacture of ammonia |10 – 11 | |Properties of ammonia |12 | |The uses and preparation of ammonia
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SO42- will decrease‚ indicating that solubility has decreased. In this experiment‚ the groups will learn the equilibria which concerns more on a saturated solutions of ammonium chloride‚ which exists in equilibrium with ammonia‚ consequently ammonium ion is a weak acid and ammonia is a weak base. OBJECTIVE: To know the effects of adding solutions of strong acid‚
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it has been estimated that nearly half the Earth’s population is fed as a result of fertilisers. Fertilisers work by providing resources much needed by vegetation‚ namely Nitrogen and phosphorous. The Nitrogen in the fertiliser is in the form of ammonia or ammonium‚ these are converted by nitrifying bacteria into nitrites‚ and then a different kind of nitrifying bacteria converts the nitrites into nitrates. The nitrates are taken up into the plant through the roots where they are assimilated into
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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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1 in vapour state sulphur partly exists as S2 molecule which has 2 unpaired electrons in the antibondind pi orbitals jus lyk oxygen and thus exhibits paramagnetism. 2 An interhalogen compound is a molecule whose atom contains two or more different halogen atoms (fluorine‚ chlorine‚ bromine‚ iodine or astatine). Most interhalogen compounds known are binary (composed of only two distinct elements). Their formulas are generally XYn‚ where n = 1‚ 3‚ 5 or 7‚ and X is the less electronegative
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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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