1.4 Common Laboratory Equipment (headless woman)

Summary

In this lab equipment tutorial, the instructor introduces various essential tools for chemistry experiments. Key items include graduated cylinders for precise liquid measurements, Erlenmeyer flasks, and beakers for rough estimates. Other tools like test tubes, stirring rods, mortar and pestle, crucibles, and Bunsen burners are highlighted for specific uses. Safety is emphasized with the use of goggles and proper handling of equipment. The video also covers the use of a balance, test tube holders, tongs, and a ceramic tile for heating substances safely.

Takeaways

• 👓 Safety is paramount in the lab, hence the use of goggles when working with glassware or chemicals.
• 🧪 Graduated cylinders are essential for accurately measuring liquids, with sizes ranging from 10ml to 255ml.
• 🧫 Erlenmeyer flasks are versatile for holding liquids and solids, but not ideal for precise measurements.
• 🥣 Beakers come in various sizes, such as 250ml, 100ml, and 50ml, and are used for rough liquid volume estimation.
• 🧪 Test tubes are used for small-scale reactions and require a test tube holder for heating.
• 🔬 A mortar and pestle are used for grinding solid materials, such as crystals, into finer forms.
• 🔥 A crucible and cover are used for heating and removing liquids from solids to dehydrate them.
• 🧪 A well plate allows for conducting multiple reactions simultaneously in individual wells.
• 🌀 A funnel is used in conjunction with filter paper for filtering liquids.
• 🔬 A balance, not a scale, is used in labs for precise measurements of substances.
• 🔥 Bunsen burners are used for heating substances in the lab, operated with natural gas and lit with a striker.

Q & A

Why do we wear goggles in the lab?

We wear goggles in the lab anytime we work with fire, glass, or any kind of chemicals to protect our eyes from potential hazards.

What is a graduated cylinder and how is it used?

A graduated cylinder is a piece of laboratory equipment used for measuring the volume of liquids. It has marked graduations indicating volume measurements, allowing for accurate liquid volume measurement.

What are the different sizes of graduated cylinders mentioned in the script?

The script mentions graduated cylinders of 100ml, 250ml, and 10ml sizes.

What is an Erlenmeyer flask and how is it used?

An Erlenmeyer flask is used for containing liquids, possibly solids, and is not a precise measuring device but can give an estimate of the volume of liquids it contains.

What is the purpose of a beaker in a laboratory setting?

A beaker is used for holding and mixing substances, and although it is not very accurate for precise measurements, it can provide a rough estimate of liquid volume.

What is the capacity of the 50ml beaker mentioned in the script?

The 50ml beaker mentioned in the script is actually marked as 40ml, which is the capacity that can be accurately measured.

What is the function of a test tube holder?

A test tube holder is used to securely hold test tubes in place, especially when heating them over a Bunsen burner.

What is the purpose of a mortar and pestle in a lab?

A mortar and pestle are used to grind materials, often solid substances that come in crystal form, to a finer consistency.

What is a crucible and cover used for?

A crucible and cover are used for dehydration, often to remove liquids from solids by heating them.

What is the use of a well plate in a laboratory?

A well plate is used to conduct reactions in each of its individual wells, allowing for multiple reactions to be carried out simultaneously.

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

A Bunsen burner is used to provide a controlled heat source in the laboratory, often for heating substances or equipment.

What is the difference between a spatula and a scoopula?

Both a spatula and a scoopula are used to transfer solids, but a scoopula is larger and often used for transferring larger amounts or bulk substances.

What is the purpose of a ceramic tile in a lab?

A ceramic tile is used as a heat-resistant surface to place hot equipment on, preventing damage to the lab bench or table.

What is the difference between beaker tongs and crucible tongs?

Beaker tongs are designed to handle beakers and other larger glassware, while crucible tongs are used for smaller, heat-resistant items like crucibles or watch glasses. Crucible tongs should not be used in a flame as they can be damaged.

Outlines

00:00

🧪 Lab Equipment Introduction

The speaker begins by emphasizing the importance of safety in the lab, particularly the use of goggles when handling glassware or chemicals. They introduce various pieces of laboratory equipment, including graduated cylinders of different sizes (100ml, 250ml, and 10ml) for accurate liquid measurement, an Erlenmeyer flask for holding liquids and solids, and beakers of various sizes (250ml, 100ml, and 50ml) for rough liquid estimation. The speaker also mentions a test tube and holder, a stirring rod, a mortar and pestle for grinding solids, a crucible and cover for dehydration, a well plate for conducting multiple reactions simultaneously, a funnel for filtering, a watch glass, a test tube rack, and a Bunsen burner for heating. Each piece of equipment is briefly described in terms of its function and use in the lab.

05:03

🔥 Advanced Lab Equipment and Safety

In the second paragraph, the speaker continues the lab equipment tour with a spatula and a scoopula for transferring solids, iron rings for heating purposes, a striker for creating sparks to ignite the Bunsen burner, and a stopper for sealing containers. They also discuss the use of a ceramic tile as a heat-resistant surface for hot equipment. The speaker introduces a balance for precise weighing, a test tube holder for heating test tubes over a flame, and a wire gauze for supporting the test tube holder. They differentiate between beaker tongs and crucible tongs, cautioning against using the latter in flames due to potential damage and unpleasant odors. The speaker concludes by reminding students to learn the names and purposes of each piece of equipment to ensure proper use and safety, and mentions a few additional items like an evaporating dish and a metal test tube rack.

Keywords

💡Graduated Cylinder

A graduated cylinder is a piece of laboratory equipment used for measuring the volume of liquids. It is a tall, narrow container marked with lines at regular intervals, indicating volume in milliliters. In the script, different sizes of graduated cylinders are mentioned, such as 100ml, 250ml, and 10ml, each serving to accurately measure various quantities of liquids, which is crucial for precise chemical experiments.

💡Goggles

Goggles are safety equipment worn to protect the eyes from flying debris, chemicals, or other hazards in a laboratory setting. The script emphasizes the importance of wearing goggles when working with glass equipment or chemicals, highlighting the priority of safety in laboratory practices.

💡Erlenmeyer Flask

An Erlenmeyer flask is a type of laboratory flask with a conical bottom and a long neck, used for mixing, stirring, and storing liquids or solids. The script mentions that it is not a precise measuring device but can give an estimate of the volume of substances contained within, which is useful for general laboratory procedures.

💡Beaker

A beaker is a simple chemical laboratory container made of glass or plastic, used for holding, mixing, and heating liquids. The script introduces beakers of various sizes, such as 250ml and 100ml, noting that they are not precise measuring tools but can provide a rough estimate of liquid volume.

💡Test Tube

A test tube is a long, thin, round tube of glass, used as a vessel in which to conduct chemical experiments on a small scale. The script mentions the use of a test tube holder, indicating that test tubes are often used in conjunction with other equipment for heating or mixing.

💡Stirring Rod

A stirring rod is a simple tool used to mix substances in a container. The script describes the use of a stirring rod for stirring liquids, which is a common procedure in many laboratory experiments to ensure even mixing of reagents.

💡Mortar and Pestle

A mortar and pestle is a tool used since ancient times to prepare ingredients or substances. The script describes using the mortar and pestle to grind solid materials, such as crystals, into finer particles, which is necessary for certain chemical reactions or preparations.

💡Crucible

A crucible is a container that can withstand high temperatures, used for melting or reacting substances at high heat. The script mentions using a crucible and cover for dehydration of solids, which involves heating to remove liquids from solid materials.

💡Well Plate

A well plate is a type of laboratory container with multiple small wells, used for conducting multiple chemical reactions simultaneously. The script describes how a well plate allows for many reactions to occur at the same time, which is useful for efficiency and comparison in scientific experiments.

💡Funnel

A funnel is a piece of laboratory equipment used to pour liquids or fine-grained powders into containers with small openings. The script mentions using a funnel with filter paper for filtering, which is a technique to separate solids from liquids.

💡Watch Glass

A watch glass is a shallow, round piece of glass used to cover containers to prevent spillage or evaporation. The script mentions using a watch glass to cover an evaporating dish, which is used in processes where liquids are heated to evaporate, leaving behind solids.

💡Bunsen Burner

A Bunsen burner is a type of gas burner providing a single open flame, used for heating, sterilization, and combustion. The script describes the Bunsen burner as a tool for heating in the laboratory, which is a fundamental operation in many chemical experiments.

Highlights

Importance of wearing goggles in the lab when working with glassware or chemicals.

Introduction to a graduated cylinder and its use for accurate liquid measurement.

Explanation of the 100ml graduated cylinder and its accuracy.

Presentation of a 250ml graduated cylinder for larger volume measurements.

Mention of a 10ml graduated cylinder for small volume measurements.

Introduction to an Erlenmeyer flask for liquid and sometimes solid use.

Description of a beaker as a rough estimate tool for liquid measurement.

Identification of a 250ml beaker and its actual usable capacity.

Introduction to a 100ml beaker and its purpose.

Mention of a 50ml beaker and its marked capacity for accurate measurement.

Explanation of a test tube and its use in the lab.

Introduction to a stirring rod and its purpose for stirring substances.

Description of a mortar and pestle for grinding solid materials.

Introduction to a crucible and cover for dehydration of solids.

Explanation of a well plate for conducting multiple reactions simultaneously.

Introduction to a funnel and its use for filtering with filter paper.

Description of a watch glass for covering an evaporating dish.

Explanation of a test tube rack for holding multiple test tubes.

Introduction to a Bunsen burner for heating purposes in the lab.

Description of a spatula for transferring solids.

Introduction to a scoopula, a larger version of a spatula.

Mention of iron rings for holding equipment in place and for heating.

Explanation of a striker for creating sparks to ignite the Bunsen burner.

Description of forceps and their use in the lab.

Introduction to a stopper for covering containers.

Explanation of a ceramic tile for placing hot equipment to protect surfaces.

Introduction to a balance for accurate weighing in the lab.

Description of a test tube holder for heating test tubes over a flame.

Explanation of wire gauze and its placement on an iron ring for heating substances.

Introduction to tongs for handling hot equipment in the lab.

Differentiation between beaker tongs and crucible tongs and their specific uses.

Emphasis on safety and the proper use of lab equipment.

Reminder about the importance of knowing the names and purposes of lab equipment.

Introduction to an evaporating dish and its use with a watch glass.

Mention of a metal test tube rack as an alternative to the wooden one.

Transcripts

greetings today I'm here to show you

some of the equipment that you're going

to be using in this

class there are many different types

many are made of glass that is one of

the reasons we wear goggles in the lab

anytime we work with

fire glass or any kind of chemicals we

will wear goggles

all right we're going to start over here

this is a graduated cylinder it is

graduated not because it went to high

school and finished and got a diploma

but it is graduated because it has

graduations this is a 100ml and you can

measure liquids accurately in this

graduated

cylinder here's another graduated

cylinder this one is a 255ml graduated

cylinder it's also very accurate for me

measuring

liquids and finally we have a 10ml

graduated

cylinder you will learn how to read

these cylinders later on in the

course this is an Erland Meer flask it

is used for

liquids possibly solid sometimes or

mostly liquids and it is not a good

measuring device graduated cylinder

are you can get an estimate though of

how much you're carrying in an Earl

Mayer

flask this is a beaker also not a good

measuring device it's not very accurate

but you can get a rough estimate of how

much uh liquid you might be carrying

this is called a 250

ml

Beaker the next size 100 ml Beaker we

have other sizes but I'm only going to

show you a few

today this one is a 50ml beaker and it's

actually marked 40 ml because this is

the capacity that you can actually

measure this is a test tube and as long

as I'm showing you a test tube I should

have here a test tube holder which I

don't but I'll come back and show it to

you how you use the test tube

holder this is a stirring Rod the

stirring Rod is used for stirring

here's the mortar and pestl the mortar

and pestl is used to

grind sometimes we have materials solids

that come in Crystal form and they have

to be

grounded this is a crucible and cover

The Crucible and cover is used for

dehydration many times of solids

removing the uh liquid inside solids so

we use it to heat things

up this is a well plate we can conduct

reactions in each one of these Wells so

we can conduct many reactions at the

same

time well

plate this is a funnel and the funnel is

used for

filtering we we use the funnel with a

filter paper I will show you that

later this is a watch glass a watch

glass is used to cover an evaporating

dish which I am missing here which I

will get for

you this is a test tube rack the point

of this is to place your test tubes in

the rack you can have three or four test

tubes or however many test tubes so you

can conduct reactions at the same time

or hold your substances at the same

time this is a bunson burner the bunson

burner is used in the lab

to heat things we use natural gas here

we will hook this up to the Jet and we

will be able to see a flame you will

learn how to light the burner at a later

date

this is a spatula we use this to

transfer solids from one place to

another this is a scopula it serves the

same purpose as a spatula except that it

is

larger here are two iron Rings iron

rings can be used to pull things in

place and to uh for heating I will

display that

later this is a striker and the striker

is used to create a spark so that you

can actually start your bunson

burner

forceps this is called a stopper and it

is used

to cover things or to stopper things

this is too large for this one but

stopper this is a ceramic tile anytime

that we heat something uh we might want

to place it here on top of the ceramic

tile of course not holding it with my

hands with your hands uh and this holds

uh something so that you're not placing

the uh hot Beaker on top of the table

and ruin the surface

I also want to show you this is a

balance it is not called a scale scales

are for fish we use balances in the lab

this is an electronic

balance one moment

couple more pieces of

equipment this is the test tube holder

that I was telling you about and this is

the purpose of the test tube holder to

hold test tubs to be able to heat over

the

burner this is a wire GSS and the gauze

is placed on top of the iron ring and we

have a pole here that we attach it to

and then we can heat substances just

like

this these two pieces of equipment are

called

tongs t n

gs this one notice it has plastic around

it this is the this is called Beaker

tongs these are called Beaker tongs and

this is the purpose of the beaker tongs

this right here is a uh just plain tongs

or Crucible tongs and the purpose of The

Crucible tongs are to be able to lift

Small Things uh such as that or to

remove a watch glass from uh on top of

the evaporating dish which I will show

you in a

minute but notice that these two are

different they they are not the same do

not put this in the flame sometimes I'll

ask you to hold things in the burner

with the tongs do not use The Crucible

tongs because you will ruin them and

it'll smell really bad around here and I

don't like that

smell so here are the pieces of

equipment that you need to use in this

class please learn the names and make

sure that you know what each piece of

equipment looks like so that you don't

mistakenly use something else for the

wrong

purpose this is also where safety

begins have a great

day oops I almost forgot there were a

few things that I didn't show you this

is an evaporating dish and the watch

glass that I showed you before goes on

top of it guess what this is for

evaporating and here's another test tube

rack you had a wooden one you saw a

wooden one now this is the metal one

that's all