Chapters 11 12 Periodic Table Name __________________ ( ) Class __________ Date _________ History of the Periodic Table Russian chemist Dmitri Ivanovich Mendeleev 1834-1907 Arranged elements in order of increasing atomic masses Elements with similar chemical properties fall into the same vertical column Such an arrangement is the Periodic Table The Periodic Table The Periodic Table is a list of elements arranged in order of ______________ _____________ (__________) ____________. Groups
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Mix it thoroughly until the solids are well dissolved. After Na2S2O3 solution is made‚ standardize the solution against KBrO3. 25.00-mL aliquots of KBrO3 solution is pipetted into three 250-mL Erlenmeyer flasks. Place about 2-3g of KI (potassium iodide) in each flask and 5mL of 3M H2SO4 (sulfuric acid) as following. Titrate with Na2S2O3 right away until the solution changes its color to pale yellow. The expression to this reaction is presented as BrO3-(aq) + 6I-(aq) + 6H+(aq) → Br-(aq) + 3I2(aq)
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Respbid‚ Theo-Bid‚ Theo-Dur‚ Uniphyl); * sodium bicarbonate (Alka-Seltzer‚ Bicitra‚ Polycitra‚ or baking soda home remedy antacid); * carbamazepine (Carbatrol‚ Tegretol); * fluoxetine (Prozac); * metronidazole (Flagyl); * potassium iodide thyroid medication (Pima); * an ACE inhibitor such as
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Chemistry Investigatory Project To determine minimum amount of Bleaching Powder Required to disinfect different samples of Water. INDEX I. Introduction o Purification of Water o History of Water Purification o Bleaching Powder II. Experiment o Aim o Requirements o Theory o Procedure o Observations o Result o Precautions Introduction 98% of the Earth’s water is present in the oceans with an average salinity of 3.5%. The remainder of the
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a silver coated copper plate. This type of printed image is called a daguerreotype‚ and is made by polishing and cleaning a silver-coated copper plate and then reacting the silver coating with iodine vapors to form light-sensitive silver iodide. The silver iodide coated plate is then exposed to light through the optics of a camera that projects and focuses an image on the plate. In the ensuing reaction‚ the silver ions are reduced to silver metal. Finally‚ the plate is treated with mercury to produce
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Iodine is insoluble in water‚ for it to become soluble in water‚ potassium iodide is added‚ forming triiodide (MEL Science‚ 2015). When reacted with starch attach to structures within a starch molecule‚ leading to a blue-black colour (Ophardt‚ 2003). Starch is a carbohydrate‚ which contains two types of polysaccharides that are
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1. Disposing of Waste - Teachers should be aware of the appropriate method of disposal for any chemical used in the school laboratory. When in doubt‚ refer to the MSDS‚ a disposal manual‚ or the source of the chemical. a. Classification of Hazardous Waste The Environmental Protection Agency classifies wastes as: Ignitable: has a flash point below 140°C‚ is an oxidizer‚ or is an ignitable compressed gas. Corrosive: has a pH equal to or below 2.0 or a pH equal to or greater than 12.5. Reactive:
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Naming Chemical Compounds PART A Name the following 1 S Sulfur 2 Sb Antimony 3 N2 Dinitrogen 4 PO43- Phosphate 5 Au Gold 6 Rb Rubidium 7 LiCl Lithium Cloride 8 AlBr3 Aluminum (III) Bromide 9 KMnO4 Potassium Manganate (VII) 10 Cu(OH)2 Copper (II) Hydroxide 11 FeSO4 Iron (II) Sulfate 12 NH4Cl Ammonium Chloride 13 ZnCO3 Zinc Carbonate 14 SnF2 Tin (II)Fluoride 15 MgSO4 Magnesium Sulfate 16 MnO2 Manganese (IV) Oxide 17 Ca3(PO4)2 Tricalcium Phosphate 18 NaOH Sodium Hydroxide
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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. Phenolphthalein is an acid-base indicator. 8. Hydrochloric acid + phenolphthalein. a. What color would be expected when combining phenolphthalein with an acid
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Relative to electrons and electron states‚ what does each of the four quantum numbers specify? 4. Give the electron configurations for the following ions: P5+‚ P3-‚ Sn4+‚ Se2-‚ I- and Ni2+. 5. Potassium iodide (KI) exhibits predominantly ionic bonding. The K+ and I- ions have electron structures that are identical to which two inert gases? 6. Without consulting the periodic table‚ determine whether each of the electron configurations given below is
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