PPT-Titrations

Photocopy revision guide page 63 Titrations Objective to know how we carry out titrations Outcomes be able to calculate solution concentrations in mol dm 3 and g dm 3 . Antacid tablets contain a material that will neutralize stomach acid about 001 M HCl in normal stomachs but higher after periods of stress and exciting weekends Most brands use calcium carbonate as the active ingredient The tablet could be directly Titration. OF bleach . Due Today: . 1. Redox Titration of Bleach Pre-Lab. 2. . Copper Reduction Formal Lab Report. Homework:. 1. Redox . Titration . Short Report. 2. Gravimetric Analysis of Phosphorus Pre-Lab. Dr. Harris. Ch. 21 . Suggested HW. : . Ch. 21: 1, 13, 29. Buffers. Solutions that contain both a weak acid and its conjugate base are called . buffers. . . Buffers have the unique ability to . resist sharp changes in pH. . Fundamental Questions for an Analytical Chemist. What is in the sample?. How much is there? . What is the elemental composition?. [C, O, N, F, Cl, P, H, . etc.. ?] . ELEMENTAL ANALYSIS. . Chemical Methods. What did one titration tell the other?  . Let's meet at the endpoint.. Why are chemists great for solving problems?   . They have all the solutions. Titration. A lab procedure by which the concentration of acidic or alkaline solutions are examined and determined. Lesson 10. Acid-Base Titrations…. PART I: . w. hat is a titration?. h. ow is it performed?. w. hat tools are needed?. PART II: . Perform Titration calculations . A titration is a neutralization reaction! . Titration of . HCl. with . NaOH. 0.00 . mL. . Titrant. Added.  . . Titration Reaction.  . . H. +. . OH. -. . H. 2. O. .  . end = 0.1000 M = 0 M . lots.  .  . . Equilibrium . Reaction. Ch. 20. Apparatus used in Volumetric analysis. A Graduated cylinder. Roughly measures the volume of a liquid. The volumetric flask. Is used to hold a definite volume of a liquid.. Should always be clean so needs to be washed out with deionised water before you start!. Assign oxidation numbers. Which is being oxidised? Reduced?. Which is the oxidising agent/ reducing agent?. . I. 2(. aq. ) . + 2S. 2. O. 3. 2-. (. aq. ) . . . 2I. -. (. aq. ) . + S. 4. O. 6. 2009, Prentice-Hall, Inc.. Titration. In . this technique a known concentration of base (or acid) is slowly added to a solution of acid (or base. ).. The . analyte. - is the solutions being evaluated and is of unknown concentration.. Vice Chair and Associate Professor, . Department of Neurology, UMMS- Baystate. Medical Director, Baystate Health Regional Sleep Program. @. drsleepykarin. Disclosure. No Disclosures. I will be comparing protocols/functionality of different PAP devices from specific manufacturers. REDOX AND POTENTIOMETRIC TITRATIONS. WE WILL LEARN FROM THIS CHAPTER:. ● . Balancing . redox. reactions . ● Calculating the reaction equilibrium constant from standard potentials. ● Calculating . What is in the sample?. How much is there? . What is the elemental composition?. [C, O, N, F, Cl, P, H, . etc.. ?] . ELEMENTAL ANALYSIS. . Chemical Methods. Types of Analysis:. Qualitative Analysis:. • Acid –Base indicators. • Mixed indicators. • Fluorescent indicators. 2.. MIXED INDICATORS:. They are mixtures of usual acid bases indicators and orange dyes. They are used to increase the sharpness of the visible end point..