Thearesa Lima 1/8/13 Unit 8 – Assignment SC155 – Intro to Chemistry 1. Which is the strongest antacid, on a single-dose basis? Which is the weakest? Explain and show your calculations. Moles of NaOH = 0.05molL Maalox - 0.05mol/L x 24.1mL = 1.205mmol/1000 = .001205 mol Tums - 0.05mol/L x 22.4mL = 1.120mmol/1000 = .00112 mol Mylanta - 0.05mol/L x 20.0mL = 1.00mmol/1000 = .001 mol CVS - 0.05mol/L x 19.9mL = 0.995mmol/1000 = .000995 mol Rennies - 0.05mol/L x 24.4mL = 1.220mmol/1000 = .00122 mol The strongest is CVS brand because less HCI was left over (0.00995) which means it used the least amount of NaOH to neutralize the acid.
Atom Arrangement (shape) of the electron pairs around the atom Hybridisation of the atom Geometry around the atom N-1 Trigonal planar sp2 Angular/bent/V-shaped N-2 Tetrahedron sp3 Trigonal pyramidal C-3 Trigonal planar sp2 Trigonal planar C-4 Tetrahedron sp3 Tetrahedron The pKa of (the conjugate acid form at) N-1 is 3.12 and the pKa of (the conjugate acid form at) N-2 is 8.02. Draw the structure of the predominant form of nicotine that exists in the human body at pH 7.4. The pH is on the base side of 3.12 and so the conjugate base will predominate and the
110.9 amu C. 111.1 amu D. 756 amu 15. What is the formula of the hydrated salt, CuSO4(5H2O? (Cu – 63.5, S=
A) NH4+ B) H+ C) N3- D) NH2– Ans: D 7. Which one of the following is the ionic compound formed between magnesium and chlorine? A) MgCl B) MgCl2 C) Mg2Cl3 D) MgCl3 Ans: B Page 1 Chem 341: Organic Chemistry, Prof. Sivaguru Jayaraman, Fall 2010. Chapter 1 Structure Determines Properties: Answers Prof. Sivaguru Jayaraman 8. Identify the condensed formula of the following structure: A) (CH3)2CHCHClCH(CH3)2 B) CH3CH(CH3)CHClCH(CH3)2 Ans: C C) D) (CH3)2CHCHClC(CH3)3 (CH3)3CCHClCH(CH3)3 9.
Results APPEARANCES OF MATERIALS USED Substance Physical Appearance Zinc Carbonate White; powderish Calcium Hydroxide White; powderish; like zinc carbonate 3 M HCL Clear liquid, resembles water 20 mesh granular zinc Grey, metallic, shiny 3% hydrogen peroxide Clear liquid; resembles water Manganese dioxide Very dark grey, black and powdery Copper sulfate Blue, crystalline in structure. Sky blue Zinc iodide Very dark purple, shiny and crystalline in structure 0.1 M acetic acid Clear liquid, resembles water Zinc oxide Very white powdery substance RAW RESULTS Data Specifided (Page 112 CRC handbook) Raw data Volume of Gas Collection Bottle (Average of 3 Trials) 14.04mL Mass of boiling tube (empty) 41.57g Mass of boiling tube with zinc carbonate 43.42g Mass of zinc carbonate 1.75g Volume of water in gas collection bottle after reaction 78.5mL Volume of gas product collected 185.2mL Mass of solid product with boiling tube after reaction 1.11g QUALITATIVE TEST RESULTS Group # Test Observation: Standard Positive/Negative Observation: Experimental Positive/Negative 1 H2 HCL + Zinc bubbling + flaming stick POP! + + flaming splint no POP - 2 CO2 Turned cloudy + Negated from experiment Negated from experiment 3 O2 MgO2 + Hydrogen Peroxide bubbling. Glow stick re-ignited + + wooden splint; glowing stick went out - 4 H2) Added 1 pea size CuSulfate + 1 drop of deionized water; blue, positive + Copper sulfate did not change color when put into wet filter paper - 5 Zn (OH)2 Zinc iodide + 3mL H2O Clear suspension + Visual inspection; cloudy. Acid test= solid + 3M Acetic acid cloudy + 6 ZnO ZnO + Heat yellow Zn Cooled White + ZnCO3 + heat yellow solid.
A(blue) B(orange) C(red) Total Total Mass(g) 28.05g 8.58g 7.3g 43.93g Number 32 11 8 51 Average Mass(g) 0.876g 0.78g 0.913g 0.861g Relative Abundance 0.6275 0.2157 0.1569 1.000 % Percent Abundance 62.75% 21.57% 15.69% 100% Relative Mass(g) 0.5497g 0.1682g 0.143g 0.8608g IV. Data Chart- V. Analysis- 6. Relative abundance is a specific type of particles divided by the total particles expressed as a number while percent abundance is expressed as the percentage of those specific particles within the total particles. When you add up the individual relative abundances, the result is 1.000. When you add up the individual
ANS: B PTS: 1 DIF: L2 REF: p. 276 | p. 277 | p. 278 OBJ: 9.2.2 Apply the rules for naming and writing formulas for compounds with polyatomic ions. STA: SC.912.P.8.7 | SC.912.N.1.1 | SC.912.N.1.6 BLM: application 58. ANS: C PTS: 1 DIF: L2 REF: p. 268 | p. 278 OBJ: 9.2.2 Apply the rules for naming and writing formulas for compounds with polyatomic ions. STA: SC.912.P.8.7 | SC.912.N.1.1 | SC.912.N.1.6 BLM:
| |bromobenzene |157.01 |4.00 |0.63g |-31 |1.49 |1 | |magnesium powder |24.305 |4.00 |0.097g |649-651 |1.74 |2 | |ethyl ether |74.12 |2.89 |3ml |-116 |.714 |3 | |benzophenone |182.0694 |3.8 | |49 |1.11 |4 | |triphenylmethanol |260.32 | | |164.2 |1.199 |5 | |5% HCl (aq.) |36.46 | |2ml |-74 |1.0-1.2 |6 | B. References (provide references for the information you've given in the table of reagents) 1. http://fscimage.fishersci.com/msds/03420.htm 2. http://WWW.jtbaker.com/msds/englishhtml/m0088.htm 3. http://fscimage.fishersci.com/msds/90868.htm 4. http://fscimage.fishersci.com/msds/02740.htm 5. http://fscimage.fishersci.com/msds/45870.htm 6. http://fscimage.fishersci.com/msds/95551.htm C. Safety (are any of the reagents used toxic or hazardous? Briefly explain here) 1. Bromobenzene causes skin
There are many books recommended for my course. Some examples of these are: A New Introduction to Human Biology, by Martin Rowland, many free e-books from www.bookboon.com, and also online journals from British Medical Journal (bmj.bmjjournals.com) 13. Assessment work should be presented in a loose leaf folder. I must post this to my tutor, along with my completed and signed assessment sheet. For level 3 work I must upload a copy of the assessment to my DLC account.
2002;21:7365–7375. doi: 10.1038/sj.onc.1205798. [PubMed] [Cross Ref] Novotny M, Merli F, Weisler D, Fencl M, Saeed T. Fractionation and capillary gas chromatographic-mass spectrometric characterization of the neutral components in marijuana and tobacco smoke condensates. J Chromatogr. 1982;238:141–150.