問題一覧
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• Used for grabbing things that should not be touched by hands
forceps
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• a round piece of glass that is slightly concave/ convex (think of a lens) • can hold a small amount of liquid or solid • can be used for evaporation purposes • can function as a lid for a beaker
watch glass
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Used to suspend burets, beakers, flasks, crucibles, etc. in some cases, a heat source
iron stand ring and clamps
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• a mechanical apparatus that is connected to a flammable gas source. • Used to produce an open flame
bunsen burner
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• There is a knob to adjust the amount of gas flow and a rotating collar that controls airflow. • These both must be adjusted to get an ideal flame for heating purposes.
bunsen burner
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can be made of plastic or glass and can have either a short stem or a long stem • Used to channel liquid or fine-grounded substances into containers with small opening
funnel
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• Made of glass, plastic, borosilicate, and topped by caps or stoppers • Intended to contain chemicals
reagent bottle
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A shallow cylindrical glass or plastic lidded dish that biologists use to culture cells
petri dish
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Used for sucking or absorbing liquids through a narrow tube
aspirator
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• Pipets deliver known volume of liquids. – Transfer pipet: calibrated to deliver one fixed volume. – Measuring pipet: delivers a variable volume
pipets
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Used to crush, mash or grind substances
mortar and pestle
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specialized clothing or equipment worn for protection against hazardous and infectious materials”
Personal Protective Equipment
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• A small glass bottle of known volume for determining the relative density of liquids and solids by weighing
pycnometer
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• a.k.a. Boiling Flask • Has round bottom and long neck • Used to hold liquids and can be easily swirled and heated
florence flask
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• Measuring an exact volume of liquid and placing it into another container – Volumetric Pipette – Graduated/ Measuring/ Mohr’s Pipette
pipette
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Used in liquid-liquid extraction to separate (partition) components of a mixture of two immiscible liquids (different densities)
seperatory funnel
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• The process can be carried out by tilting the mixture after pouring out the top layer
decantation
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Has an open center • Used to suspend crucibles
clay triangle
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• A glass tube that is open at the top and comes to a narrow pointed opening at the bottom. • Right above the bottom opening is a stopcock that can be turned to control the amount of liquid being released.
burette
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• Used for cleaning test tubes and other narrow mouth glasswares
test tube brush
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A small volumetric flask with a long graduated neck used in pharmacy for determining cinnamaldehyde in cassia bark and other forms of cinnamon
cassia flask
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Used to distribute evenly heat and support beakers during heating
wire gauze
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precipitation
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• a glass tube with one end open and the other end closed • used to hold small samples for qualitative assessment and comparison
test tubes
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• separation process which uses the action of centrifugal force to promote accelerated settling of particles in a solid-liquid mixture • Uses a centrifuge machine
centrifugation
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filtration
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Used to produce an open flame for heating, sterilization or combustion
alcohol lamp
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Used for mixing, stirring, and heating chemicals • Have spouts on their rims to aid in pour
beakers
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• A round flask with a long neck and flat bottom • Used to measure an exact volume of liquid • There is a small line on the neck that indicates how far to fill the bottle
volumetric flask
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• Used to separate mixtures of two liquids with different boiling points
distilling flask
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Small glass tubes with narrow tips on one end and a rubber bulb on the other • Suck up liquid that can then be squeezed out in small drops
droppers
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• A typical balance with a capacity of 100–200 g and a readability of 0.01–0.1 mg. – Readability > the smallest increment of mass that can be indicated.
analytical balance
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• Used to mix chemicals and liquids
stirring rod
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• Small clay cup made of a material that can withstand extreme temperatures • Used for heating substances and come with lidS
crucible
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• Used for scooping chemicals
spatula and scoopulas
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a.k.a Conical Flask • has a narrow neck and expands toward its base. • Allows easy mixing and swirling of the flask without too much risk of spilling
erlenmeyer flask
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• Used to verify gas production in fermentation
fermentation tube
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Used to move test tubes (whether due to heat or safety reasons)
test tube holder
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Three balace
analytical balance
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• There are markings along the length of the tube that indicate the volume of liquid present. • Used for extremely accurate addition of liquid, especially during TITRATION
burette
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• Made of porcelain or borosilicate glass • Used to heat liquids for evaporation
evaporating dish
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• Often better with organic solvents • High surface area
fluted filter paper
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• Used to connect two other pieces of jointware to each other
adapter
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• The process of separation of liquid from solid and other immiscible liquids, by removing the liquid layer at the top from the layer of solid or liquid below.
decantation
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• Usually a long, circular glass tube. Inside the tube there is another, smaller tube • Used to cool hot gases into liquids
condenser
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• Used for measuring volume of liquids • There are several markings up and down the length of the container with specific increments.
graduated cylinder
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• Common method of separation of solids and liquids • the act of pouring a mixture onto a membrane (filter paper) that allows the passage of liquid (the filtrate) and results in the collection of the solid (residue) – Gravity filtration – Vacuum filtration
filtration
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• Used for viewing or making enlarged images of very small objects
microscope
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• Used for measuring temperature
thermometer
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A three-legged platform used to support or hold flasks and beakers
tripod
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Used to hold crucible
crucible tong