Title Investigation of the suitability of indicators and instrumental detection of equivalence points in acid-base titration. Objective 1. To understand the importance of choosing suitable indicators for detecting the end points of acid-base titrations. 2. To obtain titration curves for some acid-base titrations. Materials and Method (Please refer to the General Chemistry BPH2012 practical manual pg 4-5) Results Part I: Suitability of Indicators A.Strong acid-weak base titration
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General Chemistry II Lab (CHEM 1106) Determination of the Solubility Product Constant of a Salt Date Performed: March 1‚ 2011 INTRODUCTION If solid KHC4H4O6 is added to a beaker of water‚ the salt will begin to dissolve. The amount of solid diminishes‚ and the concentrations of K+(aq) and HC4H4O6-(aq) in the solution increase. When no KHC4H4O6 dissolves‚ the concentrations of K+(aq) and HC4H4O6-(aq) will not increase further and any additional KHC4H4O6 added after this point will remain
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reaction rate or the oxidation-reduction between oxalic acid and potassium permanganate‚ KmnO4 is measured by recording the time elapsed for the purple colour of the permanganate ion to disappear in the reaction.As the temperature increases‚ the rate constant also increases and the rate of reaction increases as well. Addition of a catalyst reduced the height of the energy barrier and thus increases the rate of reaction. When the temperature is increased by 10oC ‚the reaction Factor is= 1.55*10^-2 which
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PNP the color change is most visible at the pH of 10. The Henderson-Hasselbalch equation is useful in determining the pH of weak acid. The equation is as follows: pH= pKa+ log ([A-]/[HA]). The pK a is the negative log of the acid disassociation constant. This equation is extremely useful figuring out the pH of a buffer solution. A buffer solution contains the mixture a weak acid and its conjugate base or a weak base and its conjugate acid. A buffer solution is useful because there resistant to pH
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dilution affect the number of moles of a substance? * What is the general form of a rate law? Rate = k[A]order – what is an order? Can you solve for k given rate‚ [A]‚ and order of A?\ * What does a rate order of zero mean? Equilibrium Constants and Le Chatelier’s Priciple * What is Le Chatelier’s principle? What does it describe? * Be able to use chemical reactions to show Le Chatelier’s principle in action. Example question: The two different colored Co(II) complex ions‚ [Co(H2O)6]2+
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SCH 4U1 FINAL EXAM REVIEW ATOMIC STRUCTURE AND MOLECULAR ARCHITECTURE 1. Describe the wave mechanical model of the atom. 2. Write the ground state electron configuration for Br. 3. Explain why the first ionization energy for Ne is significantly greater than Na. 4. Distinguish between ionization energy and electronegativity. 5. How does VSEPR Theory account for the fact that the bond angle in H2O is less than NH3? 6. Which of the following molecules are polar? Include diagrams
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Officer or Angel A theme of Sherman Alexie’s Flight is constant change‚ instability‚ and violence. The protagonist‚ Zits‚ has been shuffled from foster home to foster home since his mother passed and father abandoned him. The homes and people that Zits has been forced into are all unfamiliar. The only place that gives Zits stability and comfort is‚ oddly‚ jail. With that‚ the only person constantly in his life is Officer Dave‚ a city police officer who has arrested Zits multiple times. Officer Dave’s
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CROATICA CHEMICA ACTA CCACAA 78 (1) 99¿103 (2005) ISSN-0011-1643 CCA-2984 Original Scientific Paper Acid Value Determination in Vegetable Oils by Indirect Titration in Aqueous-alcohol Media Elena Kardash* and Yakov I. Tur’yan National Physical Laboratory of Israel (INPL)‚ Givat Ram‚ Jerusalem 91904‚ Israel RECEIVED JANUARY 16‚ 2004; REVISED JULY 21‚ 2004; ACCEPTED OCTOBER 28‚ 2004 Keywords acid value vegetable oils indirect titration A new method of acid value determination in
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The ionic product of water = Kw = [H+] x [OH‐] = 1.0 x 10‐14 mol2 dm‐6 at 298 K The expression varies with temperature pH + pOH = 14 Ka x Kb = 1.0 x 10‐14 pKa + pKb = 14 Acids The Ka is the acid dissociation constant and is a measure of the strength of an acid or in other words a measure of the ability of an acid to dissociate into ions Complete the table and statements below Ka pKa 1 x 10‐3 9.4 ‐5 1 x 10
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SUPPLEMENTARY MATERIAL I Unit V: States of Matter 5.7 KINETIC ENERGY AND MOLECULAR SPEEDS Molecules of gases remain in continuous motion. While moving they collide with each other and with the walls of the container. This results in change of their speed and redistribution of energy. So the speed and energy of all the molecules of the gas at any instant are not the same. Thus‚ we can obtain only average value of speed of molecules. If there are n number of molecules in a sample and their individual
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