Instruments in a Chem Lab

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Questions and Answers

What is the primary use of a thermometer in a laboratory setting?

To support other glassware

To weigh solids

To measure pH levels

To measure temperature (correct)

A watch glass can be used to hold solids while being weighed.

True

What is the function of laboratory tongs?

To grasp and lift hot vessels

A ______ is used to support other pieces of equipment like burettes and test tubes.

stand Signup and view all the answers

Match the following laboratory equipment with their primary function:

Pipette = Transfer liquids Test Tube Rack = Hold test tubes Plastic Wash Bottle = Clean equipment Evaporating Dish = Evaporate liquids Signup and view all the answers

Which tool is specifically designed to handle high temperature substances?

Tongs Signup and view all the answers

A volumetric pipette is used for transferring small quantities of gases.

False Signup and view all the answers

What is the purpose of using a mortar and pestle in a laboratory?

To grind and mix substances Signup and view all the answers

Which instrument is used to measure liquid volumes more precisely than beakers?

Volumetric Flask Signup and view all the answers

A Bunsen burner is safe to use in the presence of flammable materials.

False Signup and view all the answers

What is the primary use of a Mortar and Pestle?

To grind solid chemicals into fine powder. Signup and view all the answers

The ______ is used to mix and heat liquids in a lab.

Beaker Signup and view all the answers

Match the following lab instruments with their functions:

Burette = Measures volume of liquid Dropper = Transfers small quantities of liquids Crucible = Heats chemical compounds at high temperatures Evaporating Dish = Evaporates excess solvents Signup and view all the answers

Which device would you use for vacuum filtration?

Buchner Funnel Signup and view all the answers

An Analytical Scale is used for measuring mass accurately.

True Signup and view all the answers

The ______ is a graduated cylinder used to measure liquid volumes.

Measuring Cylinder Signup and view all the answers

Study Notes

Measurement Instruments

Analytical Scale & Balance Scale: Used for accurately measuring mass, with analytical scales offering higher precision.
Burette: A graduated glass tube with a stopcock, essential for measuring liquid volumes in quantitative analysis.
Measuring Cylinder: A graduated, narrow cylinder for measuring liquid volumes, with each marked line indicating a specific measurement.

Containers for Liquids

Beaker: Commonly used for holding, mixing, and heating liquids.
Erlenmeyer Flask: Ideal for mixing substances and minimizing evaporation, useful in chemical reactions.
Round Bottomed & Flat Bottomed Flasks: Designed to contain chemical reactions; round-bottomed flasks facilitate even heating.

Heating Sources

Bunsen Burner: A standard heat source for experiments, best used where flammable materials are absent.
Alcohol Burner: Alternative heat source that uses alcohol as fuel.

Chemical Preparation Tools

Volumetric Flask: Utilized for preparing solutions to an exact volume, offering greater precision than beakers or Erlenmeyer flasks.
Evaporating Dishes: Used to evaporate solvents, concentrating solutions or precipitating solids.

Filtration and Separation

Filter Paper and Funnels: Essential for filtrating mixtures; funnels aid in directing liquid into containers.
Buchner Funnel: Used for vacuum filtration, maximizing efficiency in separating solids from liquids.

Grinding Tools

Mortar and Pestle: Used for grinding solids into fine powders, boosting the efficiency of reactions and mixing.

Handling and Supporting Equipment

Stand and Clamps: Support apparatus like burettes and flasks, ensuring stability during experiments.
Test Tube Equipment: Test tubes, racks, and holders facilitate heating and handling of small liquid amounts or solids safely.

Temperature and Cleaning Instruments

Thermometers: Measure temperatures from -10˚C to 110˚C, crucial for monitoring boiling and freezing points in various substances.
Tongs: Large pincers for safely handling hot glassware or equipment during high-temperature reactions.
Plastic Wash Bottle: Utilized for cleaning laboratory equipment, filled with suitable solvents.

Weighing & Observation Tools

Watch Glass: Circular glass used for evaporating liquids, weighing solids, and as a cover for beakers, providing a versatile tool for observation and manipulation in the lab.

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Description

Test your knowledge on essential laboratory instruments used in chemistry. This quiz covers items such as scales, beakers, and burners, along with their specific functions. Perfect for 3rd ESO students looking to strengthen their understanding of chemistry equipment.