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NATIONAL HIGH SCHOOL CHEMISTRY EXAMINATION 2001 PART A MULTIPLE CHOICE QUESTIONS (60 minutes) 1. A solution of ethanol in water contains 20.0% by mass of ethanol (Mr 46.1) and has a density of 0.96864
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How to fill out a solution of ethanol
How to fill out a solution of ethanol:
01
First, gather the necessary materials: ethanol, a container (such as a glass beaker or a plastic bottle), a measuring instrument (such as a syringe or pipette), and any other required solvents or substances.
02
Ensure that the container is clean and free from any contaminants. This is important to maintain the purity of the ethanol solution.
03
Determine the desired concentration of the ethanol solution. This will depend on the specific application or experiment for which the solution is being prepared.
04
Use the measuring instrument to accurately measure the required amount of ethanol. Be cautious not to spill or waste any of the ethanol during this step.
05
Carefully pour the measured amount of ethanol into the container. It is important to handle ethanol with care as it is flammable and can be harmful if consumed or inhaled.
06
Optional: if the desired concentration of the ethanol solution is not achieved with the initial amount of ethanol, additional solvents or substances can be used to adjust the concentration. This should be done in accordance with the specific instructions or guidelines for the experiment or application.
07
Thoroughly mix the contents of the container. This can be achieved by gently swirling or stirring the solution until the ethanol is evenly distributed.
08
Ensure that the container is properly labeled with the concentration of the ethanol solution and any necessary safety warnings.
09
Store the solution in a safe and appropriate location, considering factors such as temperature and flammability.
10
Remember to properly dispose of any waste or leftover ethanol and clean the equipment and workspace accordingly.
Who needs a solution of ethanol:
01
Laboratories and scientific research facilities often require solutions of ethanol for various applications, such as solvent extraction or sterilization.
02
Industrial and manufacturing sectors may use ethanol solutions in processes like cleaning or as a solvent for producing pharmaceuticals, personal care products, or fuel additives.
03
Some medical and healthcare professionals use ethanol solutions for disinfecting surfaces or equipment.
04
Artists or individuals involved in arts and crafts may use ethanol solutions in techniques like painting or printing.
05
Home users might need a solution of ethanol for cleaning purposes, such as removing stains or deodorizing.
06
Ethanol solutions can also be used for fueling certain types of automobiles or small engines, but this should only be done in accordance with relevant regulations and guidelines.
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What is a solution of ethanol?
A solution of ethanol is a liquid mixture containing ethanol in a solvent.
Who is required to file a solution of ethanol?
Any individual or entity that manufactures, imports, or distributes ethanol solutions may be required to file a solution of ethanol.
How to fill out a solution of ethanol?
To fill out a solution of ethanol, one must provide information such as the concentration of ethanol, the type of solvent used, and the total volume of the solution.
What is the purpose of a solution of ethanol?
The purpose of a solution of ethanol is to accurately report the presence and concentration of ethanol in a liquid mixture.
What information must be reported on a solution of ethanol?
Information to be reported on a solution of ethanol may include the concentration of ethanol, the type of solvent used, and the total volume of the solution.
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