CHAPTER 3x - CHM 256 BASIC ANALYTICAL CHEMISTRY PUAN...

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CHM 256 BASIC ANALYTICAL CHEMISTRY PUAN SITI NORHAYATI BINTI MOHAMAD TARMIZI 017-6162305/05-4067422 [email protected]
CHAPTER 3 APPARATUS, TECHNIQUE AND REAGENTS
CONTENTS 1. Laboratory apparatus 2. Analytical balances (types,cares,usages) 3. Volumetric glasswares: Pipets Burets Volumetric flasks Calibration of volumetric glasswares 4. Heating apparatus: Burners Hotplates Ovens Furnace Water baths
5. Desiccators (cares, usage) 6. Titration apparatus (techniques) 7. Filtration apparatus (techniques) 8. Reagents (class based on purity & usages) 9. Cleaning solutions
What are the other laboratory apparatus that you have used?1. LABORATORY APPARATUS
4 Other types of glasswares
Balance Used in Lab Analytical Balance Auxiliary Balance Top Pan Balance Mechanical Analytical Balance Electronic Analytical Balance
Analytical Balance Single-pan Mechanical Balance Semimicro and Microbalances Electronic Balances-the most convenient Based on comparison of one weight against another and have in common factors such as zero-point drift. Zero point drift It will drift for a number of reasons, including temperature changes, humidity and static electricity. The zero point should be checked at least once every half-hour during the period of using the balance.
Typical properties: 1. Capacity to weigh 100 – 200 g 2. Measure to nearest + 0.01 to + 0.001g ELECTRONIC ANALYTICAL BALANCE
INSTALLING THE WEIGHING PAN
TO THE LEVEL ANALYTICAL BALANCE
THE BUBBLE SHOULD BE IN THE MIDDLE
DO NOT use balance at dangerous places like dusty room, near gas supply or near flammable fluid/solvent. Make sure that the balance is handled with care . Do not dismantled the analytical balance. ANALYTICAL BALANCE: SAFETY PROCEDURE

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