chemlab - midterms

laboratory fume hood

is a type of ventilation device that provide protection against hazardous or toxic fumes, vapors and dust.

laboratory fume hood

It has an exhaust fan that pulls air and air borne contaminants through connected ductwork and exhausts them to the atmosphere

Laboratory Fume Hood

Its secondary function includes protection against chemical spills, uncontrolled reactions and fires.

safety shower

is a device that enables a user to have water cascading over the entire body at one time.

safety shower

It can be used effectively in extinguishing clothing fires or for flushing contaminants off clothing.

Safety Shower

What Laboratory equipment is this?

Emergency eye wash

equipment is used to flush the eyes with water when dust, irritants, or chemicals enter the eye.

Emergency eye wash and safety shower

these 2 allow workers to flush away hazardous substances that can cause injury.

fire extinguisher

is the device used to extinguish or control small fires, often in emergency situations an not intended for use on an out- of-control fire, such as one which has reached the ceiling.

fire extinguisher

It is important to know the locations and the types of extinguishers in the laboratory

Fire Extinguisher

What Laboratory equipment is this?

A) laboratory sink

B) laboratory waste container/bin

Laboratory Equipment

beaker

is a simple container for stirring, mixing and heating liquids

Beaker

Generally cylindrical in shape, with a flat bottom and a lip for pouring and some have a small spout (or "beak") to aid pouring.

Beaker

What apparatus is this?

Beaker

It is also used for measuring the liquid

Erlenmeyer flasks

-are used to measure, mix, and store liquids.

erlenmeyer flask

These are used in chemistry labs for titration.

erlenmeyer flask

The conical shape allows the contents to be swirled or stirred during an experiment. The narrow neck keeps the contents from spilling out.

erlenmeyer flask

What Apparatus is this?

Florence Flask

-is used for heating substances that need to be heated evenly.

florence flask

The bulbed bottom allows the heat to distribute through the liquid more evenly.

Florence Flask

is mostly used in distillation experiments.

Florence Flask

What Apparatus is this?

graduated cylinder

- is used to accurately measure the volume of a liquid.

graduated cylinder

Water displacement can be used to find out the volume of solid having irregular shape.

Test Tubes

are used for holding small samples or performing small-scale reactions.

test tube rack

is used to hold test tubes while reactions happen in them or while they are not needed.

Volumetric Flasks

-are used to measure precise volumes of liquid or to make precise dilutions.

Test tube rack

What Apparatus is this?

Test tube

what apparatus is this?

graduated cylinder

what apparatus is this?

Separatory funnel

is a piece of laboratory glassware used in liquid- liquid extractions to separate (partition) the components of a mixture between two immiscible solvent phases of different densities.

burette

also buret

burette

has a volumetric graduation on its full length and a precision tap, or stopcock, on the bottom.

burette

It is used to dispense known amounts of a liquid reagent in experiments for which such precision is necessary, such as a titration experiment.

Pasteur pipette

is used to transfer out small amounts of whatever chemical is in the bottle.

Pasteur pipette

Also called droppping pipette or dropper

separatory funnel

What Apparatus is this?

burette

What Apparatus is this?

pasteur pipette

what apparatus is this?

volumetric pipette

has a single graduation that allows it to deliver one specific volume accurately.

Mohr pipette

is use to measure the volume of the liquid dispensed.

Mohr pipette

It has a series of marked lines (as on a graduated cylinder) to indicate the different volumes

Aspirator

serves as a vacuum source for filling reagents through a pipette and also help control the flow of liquid from the dropping bottle.

volumetric pipette

What apparatus is this?

Mohr pipette

What Apparatus is this?

aspirator

what apparatus is this

Watch glass

is a circular, slightly convex-concave piece of glass used to hold holding small amount of solid samples or for covering beakers.

Funnel

can be used to transfer liquids into any container so they will not be lost or spilled.

Funnel

It directs the flow of liquid into a receiving container.

funnel

It is also used for filtration

powder funnel

with a wide and short stem is more appropriate as it does not clog easily

Buchner funnel

is a piece of laboratory equipment used in suction filtration.

watch glass

what apparatus is this?

funnel

what apparatus is this?

powder funnel

what apparatus is this?

buchner funnel

what apparatus is this?

Filtering flask

is Used with a Büchner funnel for separating solids and liquids.

Filtering flask

Water is poured into the Büchner funnel with filter paper and is sucked up by a vacuum attached to the side of the flask

Crucible and cover

is a ceramic type container used when heating at very high temperatures

Evaporating dish

is a laboratory device used or heating and evaporating liquids

Clay triangle

is used in the process of heating substances by a Bunsen burner (e.g. to support a crucible when it’s being heated).

filtering flask

what apparatus is this

crucible and cover

what apparatus is this?

evaporating dish

what apparatus is this?

clay triangle

what apparatus is this?

Thermometer

is an instrument use for measuring temperatures.

wash bottle

is a squeeze bottle with a nozzle, used to rinse various pieces of laboratory glassware, such as test tubes and round bottom flasks.

Utility clamps

are commonly used to hold laboratory glassware such as flasks, test tubes, etc.

mortar and pestle

is a tool used to crush, grind, and mix solid substances.

pestle

is a heavy bat shaped object, the end of which is used for crushing and grinding.

mortar

is a bowl, typically made of hard wood, ceramic or stone.

thermometer

what apparatus is this?

wash bottle

what apparatus is this?

utility clamps

what apparatus is this?

mortar and pestle

what apparatus is this?

forceps

are a handheld, hinged instrument used for grasping and holding objects

beaker tong

is used to hold hot beaker

Crucible tong

is used for removing the lids from crucibles, transferring evaporating dishes or picking small objects out of a reaction container.

Laboratory tripod

is generally used as a platform of some sort.

Laboratory tripod

It is used to support and hold various flasks, beakers and other glass ware when not in use and also during experiments.

forceps

what apparatus is this?

beaker tong

what apparatus is this?

crucible tong

what apparatus is this?

Volumetric flasks

What Apparatus is this?

laboratory tripod

what apparatus is this?

iron stand

what apparatus is this?

Iron stand

is a metal stand consisting of a long upright rod attached to a heavy rectangular base that is used with rings and clamps for supporting laboratory apparatus.

Burners

produces a flame that can be used for various purposes, such as heating, sterilization and combustion.

bunsen burner

what apparatus is this?

tirrill burner

what apparatus is this?

balance

is used to determine the mass of the chemicals.

balance

The chemicals should be in a container and not placed directly on the balance.

balance

The chemicals should be in a container and not placed directly on the balance.

balance

It is important not to move a balance because they have been calibrated for the exact position they are in.

analytical balance, triple beam balance, platform balance

What apparatus is this?

1. Read instructions carefully before attempting to do anything.

2.Wear safety goggles to protect your eyes from chemicals, heated materials, or things that might be able to shatter.

3.Precaution should be observed in cleaning  table tops especially when there are liquid  spills which could possibly be acids or bases.

4.After handling chemicals, always wash your hands with soap and water.

5.Tie back long hair. Dangling hair can fall into the Bunsen burner and catch fire or can fall into a chemical solution

General Safety Rules 1-5

6.Roll up loose sleeves. Loose clothing should not be worn because it may dip into chemicals or fall into a flame and catch fire

7.Wear shoes that cover your feet. Sandals and open-toed shoes do not protect your feet from broken glass and chemical spill

8.Know the location of the fire extinguisher, safety shower, eyewash station, and first aid kit.

9.Know how to use the safety equipment.

10.Refrain from eating, drinking, smoking and playing inside the laboratory.

General Safety Rules 6-10

11.Do not taste any chemical!

12.Never “horse around” or play practical jokes in the laboratory.

13.Chipped or cracked glassware should not be used.

14.Broken glassware should not be disposed of in a classroom trashcan. There is a special glass disposal container for it.

15.Do not place hot glassware in water. shatter. Rapid cooling may make it shatter.

16.Unauthorized experiments should not be performed.

General safety Rules 11-16