Course Content
Matter
OBJECTIVES By the end of this topic, the trainee should be able to 1.Define matter 2.Explain state of matter 3.Distinguish between physical and chemical changes 4.Explain the gas laws
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Atoms , Elements and Compounds
OBJECTIVES By the end of this topic , the trainee should be able to; 1.Define Elements, Compounds and Mixtures 2.Describe the structure of an atom 3.Describe how to determine the Atomic number ,Mass number and Isotopes
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The Periodic Table
OBECTIVES By the end of this topic, the trainee should be able to : 1.State the historical contribution on development of the periodic table 2.Explain the periodic trends of elements and their compounds 3.State the diagonal relationships of the periodic table
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The S-Block Element
OBJECTIVES By the end of this topic, the trainee should be able to: 1.Explain the chemistry of group I and II elements 2.State the application of group I and two elements and their compounds
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Chemical Bonds
OBJECTIVES By the end of these topic, the trainee should be able to 1.Identify different types of bonds 2.Describe their properties
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Chemical Equilibrium
OBJECTIVES By the end of this topic , the trainee should be able to : 1.Define chemical equilibria 2.Explain types of equilibria 3.Determine equilibrium constant 4.Describe factors affecting chemical equilibrium
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Introduction To Organic Chemistry
By the end of this topic , the trainee should be able to : 1.Explain the aspects of organic chemistry 2.Describe hydrocarbons 3.Classify organic molecules explain chemical reactions of simple organic molecules 4.Explain the properties , synthesis and uses of simple organic molecules
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Acids, Bases and Salts
OBJECTIVES By the end of this session , the trainee should be able to : 1.State properties of acids and bases 2.Differentiate between strong and weak acids 3.Explain types and properties of salts
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PH Analysis
OBJECTIVES By the end of this topic, the trainee should be able to: 1.Define the term PH 2.Explain the basic theory of PH 3.State the relationship between PH and color change in indicators 4.Explain the term buffer solution 5.Describe the preparation of buffer solutions 6.State the application of buffer solutions
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Sampling and Sample Preparation
OBJECTIVE By the end of this topic, the trainee should be able to : 1.Define the terms used in sample preparation 2.State the importance of sampling 3.Describe the techniques of sampling 4.Describe the procedure for sample pre-treatment 5.State sample storage methods
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Separation Techniques
OBJECTIVES By the end of this topic , the trainee should be able to : 1.Define separation, extraction and purification 2.Describe the separation , extraction and purification techniques 3.Explain the methods of determining purity of substances
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Heating and Cooling Techniques
OBJECTIVES To identify various techniques used for heating and cooling substances in the laboratory
Heating and Cooling Techniques
OBJECTIVES To identify various techniques used for heating and cooling substances in the laboratory
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Distillation Techniques
By end of this topic, Trainee should be able to : 1. Define distilation 2. State and explain various distillation techniques 3. Outline Various distillation techniques 4. Outline the applications of Distillation techniques
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Crystallization Techniques
OBJECTIVES By the end of the topic, the learner should be able to: 1.To define crystallization 2.To describe crystallization process 3.To carry out crystallization procedure
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Solvent Extraction Techniques
OBJECTIVES By the end of the topic, the learner should be able to 1.Define solvent extraction 2.Explain terms used in solvent extraction 3.Describe methods of solvent extraction 4.Describe selection of appropriate solvents for solvent extraction 5.Determine distribution ration 6.Outline factors actors influencing the extraction efficiency 7.Describe Soxhlet extraction
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Chromatography Techniques
OBJECTIVES By the end of this topic, the learner should be able to: 1.Define chromatography techniques 2.Explain terms used in chromatography techniques 3.Describe principles of chromatography techniques 4.Explain types of chromatography techniques 5.Carry out chromatography experiments 6.Determine RF factor 7.Outline electrophoresis
0/6
Titrimetric Analysis
OBJECTIVES By the end of this topic, the trainee should be able to: 1.Define terms used in titrimetric analysis 2.Describe types of titrimetric analysis 3.Balance chemical reactions 4.Work out calculations involved in titrimetric analysis
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Redox Titration
Redox Titration is a laboratory method of determining the concentration of a given analyte by causing a redox reaction between the titrant and the analyte. Redox titration is based on an oxidation-reduction reaction between the titrant and the analyte. It is one of the most common laboratory methods used to identify the concentration of unknown analytes. Redox reactions involve both oxidation and reduction. The key features of reduction and oxidation are discussed below.
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Complexiometric Titration
omplexometric Titration or chelatometry is a type of volumetric analysis wherein the colored complex is used to determine the endpoint of the titration. The method is particularly useful for determination of the exact number of a mixture of different metal ions, especially calcium and magnesium ions present in water in solution .
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Gravimetric Analysis
OBJECTIVES By the end of this topic, the trainee should be able to: 1.Define gravimetric analysis 2.Describe the principles of gravimetric analysis 3.Describe the steps involved in gravimetric analysis 4.Explain factors affecting gravimetric analysis 5.Describe the equipments and apparatus used in gravimetric analysis 6.Carry out gravimetric analysis
0/8
Calorimetric Analysis
OBJECTIVES By the end of this topic, the trainee should be able to: 1.Define terms and units used in thermochemistry 2.Determine enthalpy changes in chemical reactions 3.Determine heat capacity and specific heat capacity 4.Compare calorific values of different materials 5.Determine different heat reactions 6.Apply law of conservation of energy and Hess law in thermochemical calculations
0/4
Chemistry Techniques for Science Laboratory Technicians
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Apparatus for titrimetric analysis

 (a) Weighing bottle

These consist of a cylindrical  glass vessel  with  a ground stopper  in which the material  can be weighed out  of contact with the atmosphere .its usually heated  in a steam  oven  before use to ensure  dryness and is then allowed to  cool in  a dessicator . It should be protected from contamination with fingers during handling  (using a dry cloth )

A weighing bottle can be used in two ways (I) by first weighing it when empty then when loaded. This method is tidious ad it’s likely  to expose  the substance to the atmospheric contamination  during the process of weighing . (ii) By weighing an already  loaded  bottle  then pour the substance  in a measuring flask  then letter weigh the empty bottle  and finally calculating the difference in weight

(b)  Conical flask

250cm3 capacity is usually used.  Conical  flask are made to contain  a specific  volume  of liquid  and will not deliver  that volume because  part of that liquid  will inevitably  remain  or  retained as a  film  on the sides of he flask .

  1. They are usually graded to work at  specific temperatures  eg 20oc  and should be used at temperatures close to these  .they should be rinsed before use wit h distilled water  or solvent to be used . the solvent should be added from the wash bottle  down the sides of the beaker  so as to avoid splashing . the flask should thereafter be filled with the solvent to the meniscus  mark   a teat pipette should be used to add the last drops the flash should then be stoppered and shaken vigorously
  2. Burette

They usually have a capacity of 50cm3. Some are glass  stoppered . Its first washed  is first  washed /rinsed  with  solution  to be used  whereby  the solution  should run through the jet . Its then filled to the  zero mark  then read carefully  to ensure it’s on the meniscus a sheet of white paper placed behind it . The tap is opened  and the required  volume is released and worked out by difference

Rough titration is always advisable before  doing the real accurate titration. About 1cm3  solution is released  at a time   into the solution  in the  conical flask  containing  an indicator  until the indicator changes color theses at end point

Burettes should always  be well washed  out after use . if incase an alkaline solution  have been used  in the burette , it should be washed out using  about 10cm3 of dilute acid  then rinsed using distilled water

  1. Pipettes

They are designed to deliver a  certain  volume  of liquids . When filled  to the mark, it contains  more than these volume .the extra volume is always retained  after delivery as a film on   the sides  of the pipette  and in  the tips .

The pipette is filled  past the mark  by sucking the solution  into it and allowed  to slowly drain away. Sunction devices should be used for poisonous  or corrosive chemicals . If the solution is sucked  by mouth it should spat  out at once  and the mouth rinsed . . The liquid is retained in the pipette by  pressing the forefinger  on the open end of the pipette .the tip of the conical flask is then  placed  inside the conical  flask . no attempt  should  be made  to expel the remaining  solution from the pipette  as the pipette  will have  already  delivered 25 cm3

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