Anachem Tools 2

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Equipmens Associqted with Weighing

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•Dessicator

•Dessicants

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Where dried materials are placed while they cool to minimize the uptake of moisture

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Dessicator

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- drying agents, anhyd. CaCl2, CaSO4, anhyd. Mg(ClO4)2, PO5

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Dessicants

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Dessicants

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•Anhyd. Mg(ClO4)2, PO5

•Anhyd. CaCl2, CaSO4

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Equipments for Filtration and Ignition

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•Filtering Crucibles

•Simple Crucibles

•Sintered-Glass Crucibles

•Gooch Crucibles

•Filter Paper

Hint 5

Fi Si Si GooFi

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Containers used to convert precipitate in a form suitable for weighing

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Simple Crucibles

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those made of porcelain, Al2O3, silica, and Pt are use to maintain constant mass

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Simple Crucibles

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Simple Crucibles are made of

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•Porcelain

•Al2O3

•Silica

•Pt

Hint 8

PASP

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Serves as a container and filter

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Filtering Crucibles

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What is used to hasten the Filtration

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Vacuum

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What is faster in filtration? Filtering Crucibles or Filtration Paper

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Filtering Crucibles

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Have fine, medium and coarse porosities- Made of quartz and can tolerate higher temperatures

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Sintered-Glass Crucibles

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Sintered-Glass Crucibles are made of

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Quartz

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•has perforated bottom that supports fibrous mat

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Gooch Crucibles

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What is this

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Sintered-Glass Crucibles

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What is this

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Gooch Crucibles

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What is this

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Filtering Crucibles

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What is this

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Simple Crucible

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Two types of Filter Paper

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•Ashless Filter Paper

•Coarse-Porosity Filter Paper

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made from cellulose fibers

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Ashless Filter Paper

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•Undergoes ignition if the prepitate collected on it is to be weighed

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Filter Paper

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- for gelatinous precipitates

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Coarse-Porosity Filter Paper

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What is the ideal drying temperature

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110°C

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Driers in the laboratory

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•Microwave Lab Oven

•Oven

•Muffle Furnace

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MOM

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maintains constant temperature

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Oven

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- 12 to 16 hr drying time is shortened to 5 to 6 minutes

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Microwave Lab Oven

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heavy duty, electric, controlled, drying time 1100⁰C or higher

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Muffle Furnace

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What is the temperaturw of the Muffle Furnace

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1100°C above

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Most volumetric measuring devices are -------- for it has a small coefficient of expansion

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Made of Glass

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Apparatus for measuring Volume

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•Pipets

•Burets

•Volumetric Flask

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transfer accurately known volumes from one container to another

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Pipets

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Kinds of Pipet

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•Volumetric Pipet

•Measuring Pipet

•Handheld Eppendorf Micropipets

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•transfer pipet•delivers a single , fixed volume between 0.5 and 200 ml

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Volumetric Pipet

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Volumetric delivers the volume of liquid on what range

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0.5-200ml

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Types of measuring pipet

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•Mohr Pipet

•Serological Pipet

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Calibrated to deliver any volume up to a maximum capacity ranging from 0.1 to 25 ml

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Measuring Pipet

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Range of the volume of fluids that a measuring pipet can deliver

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0.1-0.25ml

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Delivers adjustable microliter volumes of liquid

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Handheld Eppendorf Micropipets

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deliver any volume up to their maximum capacities- Has greater precision than pipet

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Buret

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What is more precise Pipet or Buret

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Buret

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With capacities from 5 ml to 5 L and usually calibrated to contain a specified volume when filled to a line etched on the neck

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Volumetric Flask

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Used for preparationof standard solutions and for dilution of samples to a fixed volumes

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Volumetric Flask

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What is the capacity of A volumetric Flask

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5ml-5L

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Using Volumetric Equipment

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•Clean by using warm detergent solutions, rinsed with tap water and distilled water . • Read volumes at eye level to avoid parallax error

Hint 44

CR

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Why should we read volumetric equipments with eye level

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To avoid Parallax Error

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the upward or downward curve at the surface of a liquid

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Meniscus

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Opaque Liquids

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Upper Meniscus

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Transparent Liquids

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Lower Meniscus