Observations of Chemical Changes Observations from Procedures Well#/ Question Chemicals Reaction A NaHCO3 and HCl-CO2 Bubbles B HCl and BTB Turns Orange C NH3 and BTB Still blue- no change D HCl and blue dye Turns green E Blue dye and NaOCl Stays blue – no change F NaOCl and KI Turns pale orange/yellow G KI and Pb(NO3)2 Milky yellow solid H NaOH and phenolphthalein Turns bright pink I HCl and phenolphthalein Bubbles- cloudy J NaOH and AgNO3 Solid formed/ turned brown K AgNO3 and NH3 No change
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Naming Chemical Compounds General Information: Scientists all around the globe use a standard method for naming chemical compounds. The standards were set up by an international committee sponsored by the International Union of Pure and Applied Chemistry (IUPAC). Having this standard makes life easier for people who use these compounds everyday. It would be tough to set up any experiment if scientists everywhere used different names for the same compound. It would also make the lab a
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modify clouds‚ which was by seeding the clouds with dry ice pellets‚ this was twenty years ago. Their coworker‚ Bernard Vonnegut‚ demonstrated that a different method would accomplish the same result‚ which was by using a smoke of silver crystals of iodide. On November 13‚ 1946‚ these American scientists had experimentally verified the theory by the Swedish meteorologist‚ Tor Bergeron‚ and the German physicist‚ Walter Findeisen‚ advanced in 1933 that if clouds contained the right mixture of supercooled
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What is Juice Plus Complete? In today’s world‚ where living a hectic life has become the new norm‚ numerous individuals will continually lack the time needed to break for a meal. Unfortunately‚ missing daily meals can have dire consequences resulting in health deficiencies. [Cite URL= https://www.webmd.com/diet/7-nutrients-your-diet-may-be-missing#1] However‚ Juice Plus Complete can assist those who sacrifice meals repeatedly‚ by providing essential nutrients needed to fill the gaps and maintain
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SILVER By: Wahida Gh-Sakhi What is Silver? Silver is a chemical element with the chemical symbol Ag and atomic number 47. A soft‚ white‚ lustrous transition metal‚ it possesses the highest electrical conductivity of any element and the highest thermal conductivity of any metal. Element Symbol • Ag • Silver‚ Symbol Element Name • Silver Atomic Mass • The atomic mass is 107.8682 Atomic Number • The atomic number is 47 Bohr-Rutherford Diagram The Story of its Discovery Unknown since prehistoric
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知識+圖片影片新聞討論區購物字典香港網頁優先 中文網頁全球網頁不限時間一天內一星期內一個月內搜尋結果 Analysis of commercial vitamin C tablets free essay‚ term paper and book reportwww.freeessays123.com/.../analysisofcommercialvitaminctablets.html 網頁紀錄 - 更多此站結果Analysis of commercial vitamin C tablets Free Essays‚ Term Papers and book reports. Thousands of papers to select from all free. ... Analysis of commercial vitamin C tablets Free Essay‚ Term Paper and Book Report Objective To determine the vitamin C ... Analysis of Commercial Vitamin C
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CHEMICAL KINETICS: IODINE-CLOCK REACTION DATE SUBMITTED: 14 DECEMBER 2012 DATE PERFORMED: 7 DECEMBER 2012 ABSTRACT Chemical kinetics involving reaction rates and mechanisms is an essential part of our daily life in the modern world. It helps us understand whether particular reactions are favorable and how to save time or prolong time during each reaction. Experiment demonstrated the how concentration‚ temperature and presence of a catalyst can change the rate of a reaction. 5 runs of dilution
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I. Title: Analysis of a Commercial Bleach II. Purpose: III. Materials: Commercial bleach‚ 5% NaClO. (5 mL). Hydrochloric acid (HCl)‚ 3M. (6 mL). Potassium Iodide (KI). (6 g). Sodium thiosulfate solution (Na2S2O3)‚ 0.100 M. (70 mL). Starch solution 2%. (3 mL). Safety goggles Apron Digital scale Buret Buret clamp Erlenmeyer flask Pipet bulb Ring stand Ttransfer pipet‚ 5 mL and 25 mL Volumetric flask‚ 100 mL Stopper Wash bottle Distilled water Weigh boat Beakers‚ IV. Procedures:
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memory (SWM) versions of memory testing. The inhibitory effect of the extract on acetylcholinesterase (AChE) in discrete rat brain regions (prefrontal cortex [PFC]‚ hippocampus [HIP] and amygdala [AMY]) was also investigated using acetyl thiocholine iodide and dithiobisnitrobenzoic acid reagent. Results and discussion: The oral administrations of methanol extract of P. cineraria in all doses tested‚ significantly (p < 0.05) improved both spatial reference and working memories in the MWM test in terms
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molecular formula iv.both have the same physical properties a.i‚iv b.ii‚iii c.i‚ii‚iii d.ii‚iii‚iv paper 2 1.in an experiment‚bromine water is added drop by drop into the potassium iodide solution in a test tube until bromine water is in excess.the test tube is shaken. a.i.state the colour of the potassium iodide solution(1m) ii.what solution colour is produced after it is mixed and shaken with bromine water?(1m) b.a small amount of tetrachloromethane liquid is added to the product in the
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