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How do you prepare chromic acid reagent?
Chromic acid reagent is prepared by dissolving chromium trioxide in water. It should be handled with caution as it is a strong oxidizing agent and can be corrosive. It is commonly used in laboratory settings for oxidation reactions.
Why should screw cap of a reagent bottle be placed bottom up on the table?
If the cover of a reagent bottle is placed on a table with the bottom down, it can pick up material from the table which would contaminate the contents of the reagent bottle after the cap is put back on the bottle.
What should you do when you have finished using a reagent?
After using a reagent, you should securely close the container to prevent spills or contamination. Store the reagent according to the manufacturer's instructions, making sure to label it with the date it was opened and any other relevant information. Dispose of any waste following proper laboratory protocols.
Why must the glass stopper of a reagent bottle never be placed directly on the laboratory bench?
The stopper of a chemical reagent container should be handled carefully for two reasons. Firstly, it may contain chemical residues which can be dangerous. Additionally, if the stopper is dirtied it may contaminate the reagent in the bottle when the stopper is put back on.
What is fouchets reagent content?
Fouchet's reagent typically contains concentrated sulfuric acid and p-dimethylaminobenzaldehyde. It is used for detecting the presence of phosphates in solution through a color change reaction to a blue-colored complex. Caution should be taken when handling Fouchet's reagent due to its corrosive nature.
Why alkaline picrate should be freshly prepared?
Many of the picrates are explosive and dangerous to store; fresh preparation limits the time that this is a risk. They also can react with their container or decompose so freshly prepared solutions will be more reliable for some processes like the Jaffe reaction to test for creatinine where the exact concentration is important in order to properly calibrate the results of the test.
How do you prepare chromic acid reagent?
Chromic acid reagent is prepared by dissolving chromium trioxide in water. It should be handled with caution as it is a strong oxidizing agent and can be corrosive. It is commonly used in laboratory settings for oxidation reactions.
Why do you need freshly prepared starch solution for iodometric titration?
because,starch undergoes a photochemical reaction. So, with the passage of time it can under go to the photochemical reaction and starch wouldnot be starch but it might have changed in anyother product. so...we should use freshly prepared starch.
Should you dye your hair when it's greasy or freshly washed?
Freshly washed.
Why should only freshly prepared solution of ferrous sulphate solution be used?
Freshly prepared solution of ferrous sulfate should be used because it is prone to oxidation when exposed to air, leading to the formation of ferric ions. This can result in inaccurate test results due to the presence of ferric ions instead of ferrous ions. Additionally, solutions that have been stored for extended periods of time may also be contaminated with impurities, affecting their effectiveness.
How do you prepare ehrlich reagent?
Ehrlich reagent can be prepared by dissolving 0.1 g of p-dimethylaminobenzaldehyde in 5 ml of concentrated hydrochloric acid and then diluting with 95 ml of ethanol. The solution should be 0.1% in p-dimethylaminobenzaldehyde.
Why starch indicator should be prepared freshly?
To prepare 1% starch indicator weigh 1g of starch powder.Measure 100ml of water and keep it for heating.by using some of 100ml water taken,make a paste of starch in watchglass and mix this paste with little and continuous strring of water which is kept for heating.when all the paste is added,allow for heating 5more minutes then starch indicator is ready for titration.Note:no lumps of starch should present in water
What expiry date should be put on freshly prepared potassium citrate?
Freshly prepared potassium citrate solutions should typically be stored in the refrigerator and used within 24 to 48 hours for optimal stability and effectiveness. However, the exact expiry date may depend on specific formulation guidelines or institutional policies. It's important to label the solution with the preparation date and consult relevant pharmacological resources or guidelines for the most accurate expiry recommendations. Always discard any unused solution after the recommended period.
What is the main verb in this sentence should have prepared?
prepared
Why should screw cap of a reagent bottle be placed bottom up on the table?
If the cover of a reagent bottle is placed on a table with the bottom down, it can pick up material from the table which would contaminate the contents of the reagent bottle after the cap is put back on the bottle.
When should a career portfolio be prepared?
A career portfolio should be prepared before starting a job search.
What should you do when you have finished using a reagent?
After using a reagent, you should securely close the container to prevent spills or contamination. Store the reagent according to the manufacturer's instructions, making sure to label it with the date it was opened and any other relevant information. Dispose of any waste following proper laboratory protocols.
