was a chemical change‚ and also to see what type and why that change occurred. DATE TABLE 1: Chemical Reactions Well Chemical #1 ( 4 drops) Chemical # 2 (4 Drops) Observations Chemical Change (Y/N) A1 NaHCO3 SodiumBicarbonate HCl Hydrochloric Acid Bubbles yes A2 NaOCl Sodium-Hypochlrite Kl Potassium Iodide Observation 1: None Add 2 drops of solution Observation 2: Solution turned blue Yes A3 Kl Potassium Iodide Pb(NO3)2 Lead Nitrate Turned Yellow Yes A4 NaOH Sodium Hydroxide C20H14O4
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halide‚ 2-chloro-2-methylbutane by reacting 2-methyl -2-butanol (t-amyl alcohol) with hydrochloric acid. Alkyl halides are of wide interest because they are widespread and have diverse beneficial and detrimental impacts .The overall reaction is given below: Procedure 1 ml of 2-methyl-2-butanol was measured using 1 ml syringe and transferred into a 5 ml conical vial. 2.5 ml of highly concentrated Hydrochloric acid was then slowly added while the vial was constantly swirled. After mixing alcohol with
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Method 1. Clean a platinum or nichrome wire by dipping it into concentrated hydrochloric acid. 2. Hold the platinum or nichrome wire at the hottest or blue part of a non-luminous Bunsen flame. 3. Repeat until the wire does not produce any colour in the flame (note: do not touch the wire‚ as salt in sweat will produce an intense sodium flame). 4. Once achieved‚ dip the nichrome wire in concentrated hydrochloric acid‚ and then dip it into a small amount of the unknown solid (or solution) to
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that was produced Part III: Reaction between zinc and hydrochloric acid Watch the Video. http://www.youtube.com/watch?v=5p540KucRc8&feature=related Observations: Appearance of penny after 4 hours ___________________________ Questions and conclusions: 1. Balance the equation‚ if necessary‚ for the reaction between zinc and hydrocloric acid. Zn + HCl ZnCl2 + H2 2. Classify the reaction between zinc and hydrocloric acid. 3. What evidence was there to indicate that a
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Discussion The second experiment of the semester focuses on separating and identifying the components of Panacetin‚ which is a common medication that relieves pain. The label reveals that Panacetin is composed of sucrose (10%)‚ aspirin (40%)‚ and Tylenol (50%). Although this information is reported‚ the true composition of Panacetin is questionable. While sucrose and aspirin are present in Panacetin‚ Tylenol may be replaced by an unknown component (acetanilide or phenacetin). Separation of the components
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flowers. [6] © UCLES 2009 0653/06/M/J/09 [Turn over 4 2 The teacher gives a student a piece of zinc and some dilute hydrochloric acid. The student uses the apparatus in Fig. 2.1 to investigate the speed of reaction of the zinc and hydrochloric acid. hydrogen measuring cylinder For Examiner’s Use zinc dilute hydrochloric acid 100 Fig. 2.1 • • • The student places 4 cm3 of the acid in a test-tube. He starts his clock. Every minute‚ he records in Fig. 2.2 the total volume of gas collected in the
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Ap Chem. Period 7 9/14/2014 Analysis of Silver in an Alloy Purpose- To determine silver content of an alloy and to calculate the percent silver in the alloy. Materials Chemicals •Silver-Copper Alloy •Nitric Acid (NHO3) •Baking Soda (NaHCO3)(s) •Sodium Chloride (NaCl)(s) Equipment •Beakers‚ 100 and 250 mL •Filter Flask and Walter’s adapter •Stirring Rod •Wash Bottle •Watch Glass •Crucible Tongs •Ring Stand‚ Ring‚ Wire gauze •Bunsen Burner •Graduated Cylinder •Rubber or Plastic
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UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certificate of Secondary Education *1144188971* COMBINED SCIENCE Paper 2 (Core) 0653/21 October/November 2010 1 hour 15 minutes Candidates answer on the Question Paper. No Additional Materials are required. READ THESE INSTRUCTIONS FIRST Write your Centre number‚ candidate number and name on all the work you hand in. Write in dark blue or black pen. You may use a soft pencil for any diagrams‚ graphs‚ tables or rough working
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__potasium permanganate c) H2SO4 ____sulphuric acid______ d) H2O ______hydrogen oxide____ e) AgNO3 ____silver nitrate______ f) Sodium bicarbonate ______Na2CO3____ g) Nitric acid _________HNO3________ h) Hydrochloric acid _________HCl_______ i) Potassium dichromate _______K2CrO4____ j) Sodium hydroxide __________NaOH____ 6. Complete the following conversion factors or problems: a) 1 cm3. = __1___ mL. 1
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Running Head: RESPIRATORY PROTECTION SELECTION Respiratory Protection Selection Therese Kress MGT. 401 Hazardous Materials Management Instructor Stephen Griffith September 29th‚ 2014 MGT401: Hazardous RESPIRATORY PROTECTION SELECTION Respiratory Protection Selection Employers have a wide variety of Respiratory Protection gear that can be used these days to protect their workers from hazardous situations
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