common laboratory apparatus

Summary

In this chemistry lab class, students are introduced to common laboratory apparatus and their uses. The lecture covers items like test tubes, flasks, cylinders, and stands, emphasizing their functions in experiments. The session includes demonstrations of how to use equipment safely and effectively, preparing students for hands-on lab activities.

Takeaways

• 🧪 The class is focused on learning about common laboratory apparatus and their specific uses.
• 🗑️ The tashku is used to contain liquids or chemical reagents for reactions.
• 🔬 The erlenmeyer flask has a flattened bottom and a slightly elevated neck.
• 📏 The graduated cylinder is used for measuring liquids.
• 🥣 The beaker is used for containing and measuring large amounts of liquids.
• 🧴 The ordinary funnel aids in filtration operations.
• 🔭 The watch glass is used for observing substances, either solid or liquid.
• 🔩 The wire gauze (juargos) is used to support vessels or containers during heating.
• 🧷 The iron stand with clamps is used to secure equipment during experiments.
• 🌡️ The thermometer is used to measure the temperature of substances.
• 🧉 The separatory funnel is used to separate immiscible liquids.

Q & A

What is the primary purpose of a tashku in a laboratory setting?

The tashku is used to contain liquids or chemical reagents for a chemical reaction.

What is unique about the design of an Erlenmeyer flask?

The Erlenmeyer flask has a flattened bottom and a slightly elevated neck.

How is a graduated cylinder typically used in a lab?

A graduated cylinder is used to measure liquids.

What is the main function of a beaker in laboratory experiments?

A beaker is used to contain liquids and also for measuring large amounts of liquids.

What aid does an ordinary funnel provide during filtration operations?

An ordinary funnel aids in the process of filtration by providing a channel for the liquid to pass through.

What is the primary use of a watch glass in a laboratory?

A watch glass is used to contain substances, either solids or liquids, for observation.

What is the purpose of a wire gauze in a laboratory setting?

A wire gauze is used to support vessels or containers when heating.

How does an iron stand assist in laboratory procedures?

An iron stand supports iron clamps and other equipment, providing stability during various laboratory operations.

What is the specific use of a mortar and pestle in a lab?

A mortar and pestle are used for grinding purposes to convert larger particles into smaller or finer ones.

What is the role of an evaporating dish in a laboratory?

An evaporating dish is used to contain liquids that need to be evaporated.

How is a steering rod utilized in a laboratory?

A steering rod is used for mixing purposes, typically in conjunction with a stirring rod.

What is the primary function of a thermometer in a lab?

A thermometer is used to determine the temperature of substances.

What is the purpose of a test tube rack?

A test tube rack is used to safely hold test tubes, especially when they contain substances that need to be heated.

How does a medicine dropper assist in transferring liquids?

A medicine dropper is used to transfer small amounts of liquids from one vessel to another.

What is the typical use of a test tube holder in a laboratory?

A test tube holder is used to securely hold a test tube when heating liquids inside it.

What is the purpose of a water trough in laboratory experiments?

A water trough is used to contain water, especially for experiments that require the water displacement method.

How does a clay triangle support a crucible during heating?

A clay triangle is used to support a crucible when heating substances inside it, preventing direct contact with the heat source.

What is the specific use of a test tube brush in a lab?

A test tube brush is used to clean test tubes, but it should not be used with acids as the bristles can melt upon contact.

What is the function of a pipette in a laboratory?

A pipette is used to measure accurate and exact amounts of liquids.

How is a volumetric flask used in a laboratory?

A volumetric flask is used to measure exact amounts of liquids, ensuring precise measurements for experiments.

What is the primary function of a separatory funnel?

A separatory funnel is used to separate two or more immiscible liquids.

How does a distilling flask work in the process of distillation?

A distilling flask is used to contain the liquid to be distilled. It works together with a condenser where the evaporated gas is condensed back into a liquid.

What is the role of a water bath in laboratory procedures?

A water bath is used for gentle heating of substances, such as when heating a liquid inside a beaker without direct exposure to a heat source.

What is the purpose of an adapter in conjunction with a condenser?

An adapter is used with a condenser to collect the distillate, which is the substance resulting from the distillation process.

How does a triple beam balance contribute to a laboratory?

A triple beam balance is used to measure or determine the mass of an object in a laboratory.

What is the function of a Bunsen burner in a lab?

A Bunsen burner is used as a heat source in various laboratory procedures, often in conjunction with a fishtail to spread the flame.

What is the purpose of a reagent bottle in a laboratory?

A reagent bottle is used to contain reagents or chemicals for use in experiments.