• Acid-Base Calculations
    solutions can be distinguished as shown below: Type of Solution pH [H+] Color of litmus Acidic < 7.00 > pink Neutral = 7.00 = in between Basic > 7.00 < blue pH and [H+] Calculations for Strong Acids and Bases By definition, strong acids and bases are 100% ionized in water...
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  • Chemistry 151 Weak Acid Titration
    unknown acids we calculated the molar mass and the Ka values. We used NaOH as the known base for titrating in all three of the titrations. Our ka value based on our titration curve of KHP was 6.9 (the equivalence point where the pH equals the pKa) and our unknown acids were determined to be Hexanoic...
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  • Acids and Bases Exercises
    CALCULATIONS INVOLVING ACIDS AND BASES    Review of Important formulas      pH = ‐ log10[H+]                            [H+]   =  10‐pH          pKa = ‐ log10 Ka                             Ka   =  10‐pKa    pOH = ‐ log10[OH‐]                       [OH‐]   =  10‐pOH    pKb = ‐ log10 Kb                              Kb  =  10‐pKb  ...
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  • Determination of Ka for a weak Acdi
    Determination of Ka for a Weak Acid Introduction In the experiment preformed the objective is to titrate a weak acid with a strong base. In a titration of a weak acid with a strong base the titrant is the strong base and the analyte is a weak acid. The reaction that will occur is the direct transfer...
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  • titration acid base
    Nick Redmond Partner: Stephan Villavicencio Thurs. Section Lab date: March 19, 1998 Report date: April 6, 1998 Abstract: The equilibrium between acids and bases during a titration can be used to determine several characteristics of the acid or the base. Sodium hydroxide was standardized to 0...
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  • Acid and Bases Ib
    H2SO4 HCl HNO3 H2SO3 • HSO4– H3PO4 ClCH2COOH HF HNO2 C6H5NH3+ CH3COOH H2CO3 H2S HSO3– H2PO4– HCN NH4+ C6H5OH HCO3– HPO42– H2O C2H5OH NH3 Figure 801 pKa/pKb (See section 8.5) Strong acid Strong acid Strong acid Strong acid 1.8/12.2 2.0/12.0 2.1/11.9 2.9/11.1 3.3/10.7 3.3/10.7 4.6/9.4 4.8/9.2 6.4/7.6...
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  • POSTLAB
    De Leon, Jo-Anna Maria N. 3ChEA Group No. 2 Experiment No. 5 Spectrophotometric Determination of pKa I. Introduction The equilibrium constant of the dissociation of an indicator in water will be determined experimentally using spectroscopic method.This experiment aims to demonstrate...
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  • Acids
    hydrogen ion concentration [H+]. •Acids are proton donors, and bases are proton acceptors. •The Henderson-Hasselbalch equation describes the relationship between pH, Pk(the negative log of the dissociation constant), and the concentrations of an acid and its conjugate base. •Buffers consist of solutions...
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  • Chem 3418 Organic Chemistry Laboratory I Acid Base Review
    ionization constant, Ka. The equation for Ka incorporates the concentration of water as a constant value. Ka = [ H3O+][A-] [HA] and Ka = Kd [H2O] Organic acid ionization constants can cumbersome to work with because they are often very small numbers. Acetic acid, for example, has a Ka is value of...
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  • Chemical Reactions
    commonly written as equations: Reaction Classification Classifying Organic Chemical Reactions If you scan any organic textbook you will encounter what appears to be a very large, often intimidating, number of reactions. These are the "tools" of a chemist, and to use these tools effectively, we must...
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  • Determine Pka of Ethanoic Acid
    Determining the pKa value for ethanoic acid Part 1: Determining the concentration of a solution of sodium hydroxide Method: 1. A clamp stand was set up to hold a burette, previously washed with distilled water and filled with sodium hydroxide solution of approximately 0.1moldm-3. The pH meter...
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  • The Determination of Acid Constant Ka
    The Determination of Acid Constant Ka Abstract When an acid or base dissolves in water, a certain percentage of the acid or base particles will break up, or dissociate, into oppositely charged ions. The Arrhenius theory defines an acid as a compound that can dissociate in water to yield hydrogen...
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  • Biochem Review
    The amino group of one amino acid and the carboxylate group of another are condensed during protein synthesis to form an amide linkage. o The bond between the carbon atom of one amino acid residue and the nitrogen atom of the next residue is called a peptide bond. o The end-to-end joining of amino...
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  • Lab of Acid Base
    Unknown Indicators, Acids, and Buffers If we knew what it was we were doing, it would not be called research, would it? – Albert Einstein In the following three experiments, you will design your own experiments. We will explain the general problem — the analysis of an unknown — and give you a brief...
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  • a2 chemistry
    appear in the rate equation. The rate equation then provides evidence about the substances involved in the rate determining step. The reaction between propanone and bromine is a first order reaction overall. Rate = k [propanone]1[bromine]0 The rate then is...
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  • Unit Plan on Acids and Bases
    systematic errors ▪ Distinguish between precision and accuracy. ▪ Give guidelines for writing the Lab report ▪ Explain the sections of a Lab report: the abstract, introduction, procedure, discussion, conclusion, and references ▪ Explain reaction between a strong acid and a strong base...
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  • Sceince
    is NOT the same as finding the pH of a STRONG acid solution. See the Related Questions link to the left of this answer to find out the difference between a strong acid and a weak acid, and if you have a strong acid, follow the link to find the pH of a strong acid solution (it is much easier!) To...
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  • Package
    each acid with an approximate pKa and indicate whether products, reactants, or neither are favoured in each case. (Klein Chapter 3) CO2H a. + CH3CH2OK C C + H LiN[CH(CH3)2] b. OH c. + CH3ONa 5. (8 pts) Give the three acids below an approximate pKa value and then explain why...
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  • subi
    temperatures and pressures that exist on Earth (as opposed to the center of the Sun), atoms will associate with electrons to satisfy the mutual attraction between opposite charges. Electrons are very light particles and move at such a speed that they behave more like electromagnetic energy (wavelength) rather ...
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  • pH Titration
    equivalence points. • Calculate the concentration of an acid (with known identity) in a sample using data from a titration with strong base. • Calculate Ka of an acid (with known identity) in a sample using titration data. Talking Points for Pre-lab Discussion Demonstrate the typical setup for a titration...
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