Angela’s Ashes As everyday life goes on‚ human beings are constantly faced with challenges that require sacrifices. In Frank McCourt’s memoir titled Angela’s Ashes‚ he talks about the constant battles his family has with life. He faces issues that no child should have to deal with leading up to his adolescent years: deaths‚ poverty‚ hunger‚ and toil. McCourt titled this memoir as a tribute to remember his mother’s unremarkable suffering. His purpose demonstrates that regardless of the experiences
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LAB REPORT Group: 6 Section: Group member: Phạm Thanh Thủy ID: BTARIU12005 Course name : GENERAL CHEMISTRY LABORATORY Period : 2012-2013 Date performed : 11-03-2013 Date submitted : 02-05-2013 INSTRUCTOR’S NAME : Hoàng Lê Sơn EXPERIMENT 1: CHEMICAL REACTIONS I. INTRODUCTION – OBJECTIVES In this first experiment‚ we will perform 8 chemical reactions and 1 flame test in order to determine 2 things : a) firstly‚ we can know
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PLF: Cesar Rodriguez E-mail: ucla.cesar@gmail.com Midterm Review Session Chemistry 14BL Midterm Review Session *The information shown below is usually provided on the exam. Also‚ remember that calculators can be used on the exam.* Absolute Uncertainties 5.00 mL pipet: ± 0.01 mL 10.00 mL pipet: ± 0.02 mL Digital balance: ± 0.2 mg 50.00 mL volumetric flask: ± 0.04 mL 100.00 mL volumetric flask: ± 0.08 mL 25.00 mL buret: ± 0.03 mL Useful information pX = -logX pH = 14 – pOH Kw
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Unit Plan On Acids & Bases May 25‚ 2006 Table of Contents I. General Objectives Page 3 II. Learning Outcomes Page 4 III. Assessment‚ Grading & Resources Page 5 IV. Tending to different Learning styles Page 7 V. Schedule Page 8 VI. Appendix 1 Page 20 Acids and bases Unit plan Grade 12 General Objectives: ▪ Introduce pH‚ acid and base definition ▪ Discuss acid
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Experiment # 4a Title: Determination of the Hardness of Water from a Waterfall Aim: To determine the molarity of EDTA and to determine the hardness of water by measuring the concentrations of calcium and magnesium in a water sample by titration. Abstract: The aim of this experiment was to determine the molarity of a sample of EDTA and then to use this sample to determine the hardness of a sample of water. This was done using a titrimetric method. This was standardized using calcium chloride.
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INDEX Sr. No. Topic 1. Aim 2. Chemical /Apparatus required 3. Theory 4. Procedure 5. Observation 6. Result 7. Precaution 8. Caution 9. Scope of the experiment 10. Reference 11. Acknowledgment AIM: To prepare phenol formaldehyde plastic / Bakelite. CHEMICALS / APPARATUS REQUIRED : Beakers Phenol Formaldehyde Glass rod Spirit lamp Wire gauge Acetic acid Hydrochloric acid(HCl) Theory : This reaction is highly exothermic‚ but that is not why
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Determination of An Unknown Amino Acid From Titration Abstract Experiment 11 used a titration curve to determine the identity of an unknown amino acid. The initial pH of the solution was 1.96‚ and the pKa’s found experimentally were 2.0‚ 4.0‚ and 9.85. The accepted pKa values were found to be 2.10‚ 4.07‚ and 9.47. The molecular weight was calculated to be 176.3 while the accepted value was found to be 183.5. The identity of the unknown amino acid was established to be glutamic acid‚
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Aim: To verify the buffering capacity of a phosphate solution using a pH meter and construct a titration curve of an amino acid to determine the pka values of its ionisable groups to identitfy an unknown amino acid. Method: The ratio of [HPO42-] to [H2PO4-] required to produce buffer solutions at pH values 5.9‚ 6.9 and 7.9 were calculated. 0.1M of H2PO4- and 0.1M HPO42- were used to mix appropriate volumes to 25mL of each of the buffer solutions. The calibrated pH meter was used to measure
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1. A particular vinegar solution has a H3O+ concentration of 0.015 M. What is the pH of the solution? a) 1.8 b) -1.8 c) 0.015 M d) 3.3 e) -3.3 2. What is the pOH of the solution in Problem #1? a) 10.7 b) 17.3 c) 12.2 d) 15.8 e) 7.0 3. The Ka of acetic acid is 1.8 x 10-5. What is its pKa? a) 1.8 x 10-5 b) 5.18 c) 4.74 d) -4.74 4. What is the pH of a 0.100 M solution of acetic acid? a) 1.34 x 10-3 b) 2.87 c) 1.00 d) 4.74 e) 3.74 5. What is the acetate ion (Ac- or CH3COO-) concentration of the solution
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Investigation of pH titration curves (Topic 8) Criteria Assessed: DCP‚ CE Time allowed: 1.5h Name: ________________________ Internal Assessment Criteria Aspect 1 Aspect 2 Aspect 3 Total DCP CE Aim: The aim of this practical is to plot and investigate the pH titration curves for the titration of a strong acid with a strong base and of a weak acid with a strong base‚ and find Ka of the weak acid. Procedure: Part I 1. Pour 30 ml of the HCl solution of unknown concentration in a 100 ml beaker
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