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To ensure that the heat from a burner is spread evenly across the bottom of a beaker, one should use a _______.?
OLALEKAN OWASOYO
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Foster Schroeder
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How can a liquid be transferred from a beaker to a funnel without running down the outside walls of the beaker?
There is a technique of pouring down a glass rod detailed here: a glass rod is held across the top of the beaker with one end sitting in the beaker's spout and extending approx. 2 to 3 inches beyond the wall of the beaker. The beaker is then tilted, slowly, with the rod pointing into the top of the funnel, until the liquid contents run along the rod and drip into the funnel.
How do you increase the temperature of a burner flame?
Ensure a good air supply by opening the hole in the collar fully.
Describe the procedure of making copper sulphate crystal using copper oxide and sulfuric acid?
Equiptment: Bunsen Burner, tripod, Gauze, heatproof mat, basin, stirring rod, spatula, measuring cylinder, Funnel, filter paper, Chemical; CuO+H2SO4First measure 20cm3 of sulphuric acid, H2SO4, using a measuring cylinder and pour it into the beaker.Take 1 spatula of copper (II) oxide and put it into the same beaker.stir the mixture using a stirring rod to ensure complete neutralisation of the acidAdd excess CuO if required.Filter the mixture into a basin.Turn on Bunsen burner but make sure it is on the heatproof mat, and then put the tripod on top of the Bunsen burner followed by the Gauze and basin containing CuSO4.Heat the filtrate until you begin to see crystals forming around the basin.Turn off Bunsen burner and leave to dry.
How do you make saturated potassium oxalate?
1. Gather together: a test tube, a thermometer, a 10 mL graduated cylinder, a 400 mL beaker, and a 100mL beaker. Half-fill the 400 mL beaker with hot water from the kettle, then place it on a hot plate. 2. You will be assigned a mass of KClO3 between 1 - 4 grams. Assigned mass: _____ g 3. Stand the test tube in the 100 mL beaker. Place these on the scale together. Press the tare button. 4. Use the funnel provided to add the desired mass of KClO3 into the tube (do not allow the funnel to touch the tube or otherwise affect the mass). If you spill any chemical, on the scale or in the beaker, brush it away before you take your final measurement. Your mass should be exact (within ± 0.02 g). 5. Measure exactly 10 mL of distilled water in a graduated cylinder (adjust the volume using an eyedropper); add this to the tube. Ensure any solid clinging to the side of the tube is washed down to the bottom. 6. Place the tube and contents in a hot water bath (i.e. the 400 mL beaker). Stir carefully with the thermometer until all the KClO3 has dissolved. Do not heat the tube beyond the point where all the solid is dissolved. 7. Lift the test tube out of the water bath (use paper towel to hold the tube if it is too hot). Allow the solution to cool slowly, stirring occasionally with the thermometer. If several minutes have passed and you do not see any precipitate form, run cool tap water on the outside of the tube to cool it down faster. Note the temperature at which the first crystals of KClO3 come out of solution: ______°C. 8. Repeat step 7 (reheat, and then re-crystallize, the KClO3) at least once more to confirm your temperature value. Subsequent readings will be more accurate because you will know what to look for. 9. Wash the KClO3 down the sink and clean out the test tube. Rinse and return all equipment. 10. Give your temperature value (along with the mass of KClO3 used) to your teacher.
What was done in the experiment to ensure that all KHCO3 was react?
To ensure that all KHCO3, a weak base, was reacted, the substance would be treated with an excess amount of a strong acid like HCl.
How can a liquid be transferred from a beaker to a funnel without running down the outside walls of the beaker?
There is a technique of pouring down a glass rod detailed here: a glass rod is held across the top of the beaker with one end sitting in the beaker's spout and extending approx. 2 to 3 inches beyond the wall of the beaker. The beaker is then tilted, slowly, with the rod pointing into the top of the funnel, until the liquid contents run along the rod and drip into the funnel.
Q: Why do you have to turn off the Bunsen burner before you place the test tube containing methylated spirits in the beaker of water?
It seems like there might be a misunderstanding in your question. It's important to clarify that a Bunsen burner is a piece of laboratory equipment used for heating, and methylated spirits (commonly known as denatured alcohol) is a type of alcohol used for various purposes, such as fuel or disinfectant. If you are heating a test tube containing methylated spirits over a Bunsen burner and then placing it in a beaker of water, here are some reasons why you might want to turn off the Bunsen burner before doing so: Safety: Turning off the Bunsen burner reduces the risk of an open flame near flammable materials like alcohol, which can catch fire easily. By turning off the burner, you eliminate this risk. Control of the heating process: Once the test tube is heated to the desired temperature, turning off the Bunsen burner allows you to control the heat transfer to the test tube and its contents. This can prevent overheating and potential hazards. Preventing accidents: If the Bunsen burner is left on while placing the hot test tube in a beaker of water, it could potentially cause the water to splash or boil violently, leading to accidents or injuries. Turning off the burner eliminates this risk It's important to follow proper laboratory safety protocols and procedures to ensure the safety of yourself and others in the lab. Always be cautious when handling flammable materials and hot equipment to prevent accidents and injuries. Preventing accidents: If the Bunsen burner is left on while placing the hot test tube in a beaker of water, it could potentially cause the water to splash or boil violently, leading to accidents or injuries. Turning off the burner eliminates this risk.It's important to follow proper laboratory safety protocols and procedures to ensure the safety of yourself and others in the lab. Always be cautious when handling flammable materials and hot equipment to prevent accidents and injuries.
Why the beaker covered during the development of chromatogram?
During the development of a chromatogram, it is better to cover it with a beaker to prevent evaporation, which will affect the movement of the solute and solvent system. This will ensure that the chromatogram will develop properly.
How do you increase the temperature of a burner flame?
Ensure a good air supply by opening the hole in the collar fully.
Why do you need to ensure that the air hole is closed before you light the bunsen burner?
it's to prevent a strike-back
Parts of a Bunsen burner?
The parts of a Bunsen burner has collar,base.air hole and barrel. Collar : Adjust size of air hole Base: Support Bunsen Burner Air hole: Allow air to enter air hole Barrel:To ensure the flame is adjusted to a suitable position
What should you always do with the burners even when they're off?
ensure the burner's gas on or electric on knob is in the 'off' position. when the burner is cold, clean the burner and to the grease ring below, if provided, with water and perhaps with a mild soap so that the accumulated debris grease and food stuffs from the prepared but now eaten last supper are removed.
How do i ensure the crankshaft is at bottom dead center?
Align the piston number 1 (in firing order) at its bottom most position.
When you boil milk you have to be very careful to ensure that it does not boil over and spill on the burner There is no such problem when you boil water Why?
Milk contains proteins, which burn. Water doesn't.
Provide two examples of how the Bunsen burner is used during inoculation of a tube culture?
A loop is sterilized by inserting it into a Bunsen burner flame until it is red hot. 1) This will incinerate any contaminating organisms that may be present. 2) This will ensure that viable cells are transferred.
What is the best way to clean gas lamps safely?
Gas lights should be cleaned after turning off the gas and allowing the entire appliance to cool to the ambient temperature. After the insect screens and mantle have been removed, the burner tips can be cleaned with a pipecleaner or an air duster. The insect screens can be cleaned with an air duster or toothbrush. Ensure all apertures are now clear to ensure sufficient flow or air and gas to the burner.
What makes a test fair?
to ensure a fair test, the scientist carrying out the experiment must be fair skinned with fair hair. otherwise the test will not be fair, obviously. Another way to do a fair test is to talk around a fair, try out the rides and evaluate.
