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Why is it important to do multiple trials of a titration, instead of only one trial?

Appl Of Ms Excel In Analytical Chemistry

2nd Edition

ISBN:9781285686691

Author:Crouch

Publisher:Crouch

Chapter7: Neutralization Titrations And Graphical Representations

Section: Chapter Questions

Problem 12P

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Explain why even though an aqueous acetic acid solution contains acetic acid and acetate ions, it cannot be a buffer.
a.Calculate the pH of a buffer that is 0.1M in lactic acid, C2H4(OH)COOH, and 0.1M in sodium lactate, C2H4(OH)COONa. b.What is the pH of a buffer that is 1M in lactic acid and 1M in sodium lactate? c.What is the difference between the buffers described in parts a and b?
Why should we do a standardization every time we do a titration?
What is standard solution ? Why is a standard solution necessary for titration?
Why is titrant added rapidly at the beginning of titration but more slowly as titration proceeds?
A student titrates samples of a base with a standardised acid. The titration values obtained for each sample is given in Figure 5. What is the average titration value in cm³ that the student should use in further calculations? * Your answer
The final part asks for molar solubility.
Second slide: A Picture from the internet of a Titration. The words titration, primary and secondary standard defined.
In a titration, what volume (in milliliters) of 0.250M NaOH is required to neutralize 40.0 mL of 0.1125M HCl? Select one: a. 18.0 mL b. 5.56 mL c. 200 mL d. 13.6 mL e. 180 mL
Part C – Acid–base and solubility equilibria 1. Rinse 4 regular size test tubes and a 10 mL measuring cylinder thoroughly with water. Number the test-tubes from 1 to 4 in a test tube rack. 2. Into each of test tubes 1 – 3 put a small amount of solid benzoic acid (put the same amount – about the size of a pea – in each test tube). 3. Add 2 mL (use the measuring cylinder) of water to tube 1 and shake to mix the contents. 4. Add 2 mL (measuring cylinder) of 2 M HNO3 to tube 2 and shake to mix the contents. 5. Rinse the measuring cylinder with water, then use it to add 2 mL of 2 M NaOH to tube 3 and shake for about 10 seconds to mix the contents. Rinse the measuring cylinder. 6. Pour about half of the solution from tube 3 into tube 4, than add 2 mL of 2 M HNO3 to tube 4. 7. Allow the test tubes to stand for 2 or 3 minutes then record the appearance of the mixtures in each test tube. 8. Answer the questions on the results page relating to this equilibrium system.
Review sheet: titration reaction (chemistry)
Match each term with its definition or description. 0000000 The point in a titration when the added amount of standard reagent is equal to the amount of analyte being titrated. A volumetric analysis technique used to determine the unknown concentration of a solution by using the known concentration of another. A solution of unknown concentration. The standard reagent of known concentration that is added from a buret to the analyte solution. A common concentration unit - moles per liter. The point in a titration when a change in the analyte solution is observed, indicating equivalency. It is added to the analyte solution and aids in the observation of the completion of the reaction. molarity equivalence point Answer Bank end point titration titrant analyte indicator