Press "Enter" to skip to content

Start Searching the Answers

The Internet has many places to ask questions about anything imaginable and find past answers on almost everything.

What can hold 100 ml of water?

A 100 ml volumetric flask is designed to hold exactly 100 ml, but if the liquid is poured out it will actually deliver a little less than 100 ml. Glassware designed to deliver, like pipets and burets, are marked with a TD. These pieces of glassware account for the small amount of liquid that remains behind.

What is used to heat contents in a lab?

Mixing a small amount of chemicals together. … A narrow-mouthed container used to transport, heat or store substances, often used when a stopper is required. Erlenmeyer Flask. Heating contents in the lab.

What is used to clean the inside of a test tube?

Use test tube brushes with soapy water to clean inside test tubes or beakers; use sponges to clean inside beakers.

What is used to suspend glassware over a Bunsen burner?

Wire gauze Suspending glassware over the Bunsen burner Tongs Transport a hot beaker; remove lid from crucible. items. File Used to grind down materials or sharpen items. with water or keep materials moist.

What holds 100mL water?

BAKER: Holding 100mL of water. Beaker is mainly used for holding liquids in the laboratory, but it can be used for a variety of other purposes such as measuring liquids or as a collecting vessel in acid-base titration. It comes in different sizes and it can be made of glass or plastic.

What can you use to avoid breakage when heating a glassware?

Overlooking of safety guidelines and procedures

  1. Do not use cracked or chipped glassware.
  2. Always use glass beads when boiling liquids in beakers or round bottom flasks.
  3. Never heat liquids directly on a naked flame. …
  4. Carry out acid digestions inside a fume hood.
  5. Never stock reagent bottles on laboratory floor or walking isle.

Can be used to heat large amounts of liquid?

lab equipment and uses

florence flask Used for heating substances that need to be heated evenly. The bulbed bottom allows the heat to distribute through the liquid more evenly. The Florence Flask is mostly used in distillation experiments.
forceps Used for picking up and moving small objects.

What property is important for glasswares that are heated?

PYREX glassware can be heated directly on hot plates or above Bunsen burners with low risk of thermal breakage because its thermal expansion is very low.

Which glassware is most precise?

Volumetric Glassware Volumetric pipets, flasks and burets are the most accurate; the glassware makers calibrate these to a high level of accuracy. The accuracy is usually measured in terms of the tolerance, which is the uncertainty in a measurement made with the glassware.

What should you do every time you are about to heat glassware on a hot plate?

Check that there are no cracks in the glassware. Ensure that the glassware is designed for heating. Inspect the hot plate for frayed cords. 0 Measure the height and width of the glassware.

Should you shake down a lab thermometer?

Do you need to shake down the lab thermometers? * No, do NOT shake the lab thermometers. They do not need to be shaken, and you might break them.

Can I put a glass beaker on a hot plate?

Using Hot Plates Safely Do not place thick-walled glassware, such as filter flasks, or soft-glass bottles and jars on a hot plate. The hot plate surface should be larger than the vessel being heated. Do not use the hot plate in the presence of flammable or combustible materials.

Can a Erlenmeyer flask be heated?

So, although Erlenmeyer flasks can be heated, they are not specifically designed for high temperature, constant heating applications. For this, you should use a boiling flask. … Since most Erlenmeyer flasks are made with Pyrex glass, there should be no problem heating them up.

Why do we need to pre rinse all glassware?

Beware of Impurities When you‘re cleaning your glassware, you use water to rinse it off. If the burette is not completely dry by the time you use it, the remaining traces of water on the inside will make your titrant more dilute and thereby change its concentration.

Why can the Erlenmeyer flask be wet?

2. Why can the Erlenmeyer flasks that you put your samples of acid into be wet? Extra water changes the molarity of the KHP solution, but this doesn’t matter.

Why do we pre rinse glassware?

It’s often necessary to dry or prerinse a graduated cylinder for use in chemistry lab. When you wash or dispense liquid from a graduated cylinder, a small amount of liquid remains. This liquid can have an adverse effect on your results, so you may need to either prerinse the cylinder or else remove the liquid.

How do you clean volumetric glassware?

In some cases, you may need to soak the glassware overnight in soapy water. Clean pipets and volumetric flasks using warm soapy water. The glassware may require scrubbing with a brush. Rinse with tap water followed by 3-4 rinses with deionized water.

How do you clean lab glassware?

General Procedure For All Glassware Use warm tap water and a brush with soapy water to scrub the inside of curved glassware. This waste water can go down the sink. Remove soapsuds with deionized water to avoid harsh water stains. The DI water rinse should form a smooth sheet when poured through clean glassware.

What should you do with glassware at the end of the lab?

You can also “rinse” the piece of glassware with the solution you are putting in it. This is called “conditioning” the glassware. Use a small amount of your solution to rinse down the walls of the glassware, then dispose of that small amount of contaminated solution properly.

What is the final step in cleaning glassware?

specific hazard. The final step in cleaning glassware is to dry it with a clean paper towel (T/F + explanation) F, dry by evaporation. Glassware is clean if no water droplets cling to its wall. (

Why should you only use clean glassware in a lab?

Cleaning laboratory glassware is important because contaminated or dirty glassware can lead to inaccurate results in the lab. A good way to confirm that your glassware is clean is to make sure that distilled water uniformly wets the surface, according to Corning.

What is the most common cause of injury in the laboratory?

Even when safety regulations are followed, emergencies can happen in the laboratory. Therefore, it is important to know what to do in the case of an accident. The three most common types of laboratory accidents are chemical spills, fires and explosions, and personnel injuries.

What is the consequence of not following the lab rules and procedures?

When lab safety procedures aren’t followed, people can get hurt–or worse. Lab equipment and chemicals that are improperly handled can result in personal injury and even death.

What is the first thing you have to do if there is a fire in the lab Labster?

Ensure the safety of everyone around. Press the circuit breaker so that all of the machines in the lab will be turned off. Evacuate through the emergency exits. These ensure that nobody can get trapped in case of a fire, and therefore should always be kept clear.

What do you do if you get injured in the lab?

Seek Medical Help Immediately!

  1. Seek Medical Help Immediately!
  2. Do not flush with water.
  3. Cover the burned area with a cool, moist, bandage or clean cloth.
  4. If clothing is stuck to the burned skin do not remove the clothing since this may result in additional damage.