Stoichiometry

Beschreibung

Dilutions, Quantitive Analysis (Volumetric and Gravametric)
Yaeesh Khan
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Yaeesh Khan
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Zusammenfassung der Ressource

Stoichiometry
  1. DILUTIONS
    1. C1V1 = C2V2
      1. Example 1 --------------- Potassium ion for intravenous drips should be administered at 0.04 moll-1. How many ml of 1.0 moll-1 of concentrated solution should be made up to 0.5l to obtain the correct concentration?
        1. Answer
        2. Example 2 --------------- What volume 0.5moll-1 sodium carbonate is required to make, by dilution of water, one litre of a solution with a Na+(aq) concentration 0.2moll-1?
          1. Answer
        3. Principals Of Chemical Reactions
        4. Balanced Chemical Equation = Stoicheometric Equation
          1. QUANTITATIVE ANALYSIS
            1. Uses stoichiomteric equations to establish amount of a given element compound in a sample
              1. VOLUMETRIC ANALYSIS
                1. VOLUME
                  1. Determine the concentration of a solution using a STANDARD SOLUTION
                    1. Standard solutions prepared from PRIMARY STANDARD
                      1. Properties of a Primary Standard
                        1. Common Primary Standards
                      2. ACID/BASE TITRATION
                        1. C1V1P1 = C2V2P2
                          1. Example 1 ---------------- What is the concentration of citric acid ( a triprotic acid) in lemon juice if 10ml of the juice requires 12.0ml of 0.050 moll-1 sodium hydroxide for complete neutralisation.
                            1. Answer
                          2. C1V1/n1 = C2V2/n2
                            1. Example 2 ------------ Flask contains 52.5ml of 0.15moll-1 calcium hydroxide, Ca(OH)2. How many ml of 0.35ml sodium carbonate (Na2CaO3¬) are required to react completely with the calcium hydroxide?
                              1. Answer
                            2. Calculate unknown concentration of acid or base
                              1. Colour change = Endpoint (Indicator)
                              2. REDOX TITRATION
                                1. C1V1/n1 = C2V2/n2
                                  1. Example
                                    1. Answer
                                  2. Acidified Potassium Permanganate commonly used (SELF indicator)
                                    1. iodine also used with starch as indicator
                                      1. Based on oxidation/reduction reaction
                                      2. GRAVAMETRIC ANALYSIS
                                        1. MASS
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