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Beakers and Erlenmeyer flasks can be heated directly on a hot plate. These containers have a flat bottom and heat will be spread evenly throughout the solution when the solution is also stirred. Other containers that do not have a flat surface should be heated indirectly.Using them in this way may well lead to cracking, fracturing or worse, and is unsafe. 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.Re: Boiling in an erlenmeyer flask
Boiling in the flask works great for me and then no need to sanitize the flask or transfer to it after cooling.
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Can you microwave Erlenmeyer flask?
Using them in this way may well lead to cracking, fracturing or worse, and is unsafe. 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.
Can I boil water in an Erlenmeyer flask?
Re: Boiling in an erlenmeyer flask
Boiling in the flask works great for me and then no need to sanitize the flask or transfer to it after cooling.
Can you put an Erlenmeyer flask on an electric stove?
If you have an electric stove that has coils embedded under a glass cook top, you are good to go. I have been using some flasks this way for years not worries. I do let it cool a little bit off the burner before dumping it ice cold water. Even the best labware tends to weaken with such an extreme swing in temp.
Is Erlenmeyer flask heat resistant?
Erlenmeyer Flask, 500ml, Heat Resistant Glass, 180mm X 102mm.
Can you put a beaker in the microwave?
“Lab-grade glass beakers can withstand extremely high temperatures; they’re really high quality. You can use them to measure ingredients, you can put them in the microwave to heat things up, and you can easily pour from them,” Dr.
Why should you never heat a volumetric flask?
Why should you never heat a volumetric flask, or add a hot solution to a volumetric flask? Because it can be broken. Unlike round bottom flask, volumetric flask has local heating due to the tension in the glass.
Can you heat a graduated cylinder?
Can a cylinder be heated? Yes, although the glass models, which are made of borosilicate glass, can take more heat than the plastic cylinders. Borosilicate glass cylinders can withstand temperatures of 329°F (165°C) and are also resistant to thermal shock.
Can you heat a volumetric flask?
Do not heat volumetric glassware (it will break if you do). Usually you can get around the problem of wet volumetric glassware by rinsing it with 4 or 5 small aliquots of the solution to be measured so the solution replaces the water.
What is the function of Florence flask?
It is used as a container to hold liquids. A Florence flask has a round body, a long neck, and often a flat bottom. It is designed for uniform heating, boiling, distillation and ease of swirling; it is produced in a number of different glass thicknesses to stand different types of use.
What does a volumetric flask measure?
A volumetric flask is lab glass or plasticware used to prepare a solution. It is used to make up a solution to a known volume. Volumetric flasks are used to measure volumes much more precisely than beakers or Erlenmeyer flasks.
How can be safely heated a flammable solvent to its boiling point?
A steam bath is a relatively safe way to heat flammable organic liquids. They are designed to heat beakers, Erlenmeyer flasks, and round-bottomed flasks, and have a series of concentric rings that can be removed to adjust to the size of the flask.
How do you heat a round bottom flask?
Heating can also be accomplished by submerging the bottom of the flask into a heat bath, water bath, or sand bath. Similarly cooling can be accomplished by partial submerging into a cooling bath, filled with e.g. cold water, ice, eutectic mixtures, dry ice/solvent mixtures, or liquid nitrogen.
Can you heat up a Hydro Flask?
The simple answer is “NO.” that Hydro Flask water bottles are Not fit for boiling water and cooking.
Can Volumetric Flasks be heated?
Do not heat volumetric glassware (it will break if you do). Usually you can get around the problem of wet volumetric glassware by rinsing it with 4 or 5 small aliquots of the solution to be measured so the solution replaces the water.
Can you heat up a thermo cup?
Warm your thermos by filling it with boiling water. Put the lid on. Let it sit for a few minutes then pour out the water. Once your thermos is warm, quickly add steaming hot food (at or above 74°C or 165°F) or boiling hot drinks and put the lid on tightly.
What should you do every time you’re about to hit glassware on a hot plate?
Allow plenty of time for hot apparatus to cool before touching it. – When bending glass, allow time for the glass to cool before further handling. Hot and cold glass have the same visual appearance. Determine if an object is hot by bringing the back of your hand close to it prior to grasping it.
Hot-Plate/Magnetic Stirrer: Heating
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organic chemistry – Why are we not supposed to heat Erlenmyer flasks? – Chemistry Stack Exchange
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Boiling in an erlenmeyer flask
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yeast – Can I heat a starter in an erlenmeyer flask on an electric stove? – Homebrewing Stack Exchange
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Chemistry Lab – 5 – Florence Flask / Boiling Flask – YouTube
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Directly heating Erlenmeyer flasks
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PSA: Don’t super heat you erlenmeyer flask on the stove. : Homebrewing
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Hot-Plate/Magnetic Stirrer: Heating
A hot plate is used to heat objects or containers. Flasks or beakers containing solutions can be heated directly or indirectly depending upon the shape of the container and the desired temperature. Always use the lowest temperature setting possible when heating. Note: NEVER heat a volumetric flask. Direct heating:
Beakers and Erlenmeyer flasks can be heated directly on a hot plate. These containers have a flat bottom and heat will be spread evenly throughout the solution when the solution is also stirred. Other containers that do not have a flat surface should be heated indirectly. Controlling the temperature of the solution is more difficult when using direct heating. Even low temperature settings on the hot plate may reach temperatures in excess of 100°C and the temperature of the plate will flucuate due to air currents or room temperature changes. Indirect heating:
When the container does not have a flat surface or more control over the temperature is required, indirect heating should be used. To indirectly heat a container, set up a bath on the hot plate. The bath is assembled by placing a liquid or solid in a large beaker (or a container that looks like a beaker). The bath is heated and the sample is placed in the bath. Selection of the liquid or solid can help to control the temperature of the bath. If a sample is not to be heated above 100°C, then water can be used in the bath (since liquid water can not be heated above its boiling point). Likewise, other liquids could be chosen to control the amount of heating. Liquids should not be flammable or present any other hazards. Remember to replace the liquid as it evaporates. Sand is a common solid used in heating baths. Sand can be heated to very high temperatures without having to be replaced due to evaporation.
Why are we not supposed to heat Erlenmyer flasks?
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This really depends on what you mean by heating.
One of the main uses for Erlenmeyer flasks is for recrystallization, which of course involves heating the container and contents. Typically this is only moderate heating, such as over a steam bath or with a hair dryer. Some manufacturers specify that their Erlenmeyer flasks are ideal for heating applications.
Traditionally, boiling flasks have more uniform and thicker walls, which allow for much greater heating limits, and a more uniform heating distribution. They are designed to handle more intense localised heating, and manage thermal and physical shock distribution. Erlenmeyer flasks usually have thinner walls and greater wall thickness variation, and are less able to handle sudden thermal changes, such as heating with a high energy source like a Bunsen, or heat gun. Using them in this way may well lead to cracking, fracturing or worse, and is unsafe.
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.
Boiling in an erlenmeyer flask
Don’t fill the flask to the top and you should be fine as well. I usually leave 1L of headspace in my flask and reduce the heat just before a boil and have no issue (as long as I keep a close eye on it).
Using a wide mouth version of the Kimax helps, too. It’s less apt to erupt than the narrow mouth version. I’ve used both. Still, I stopped boiling starter wort in flasks. I used a small pot and transferred.Now days I mix up enough wort for multiple starters. I mix up several gallons, fill canning jars and sterilize them in a pressure cooker. It may sound like a lot of work, but it isn’t. I can make enough wort for a half dozen starters with slightly more effort than it once took for a single starter. It’s really handy to have sterile wort on hand.
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