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Why is it necessary to keep the standard solution in a clean and dry reagent bottle?
Standardized Sodium Hydroxide (NaOH), as most laboratory chemicals should be stored in a sealed bottle to avoid evaporation of the Water portion, which in turn would increase the concentration of the NaOH over time. (this can be observed experimentally by placing a drop of the NaOH(aq) solution on a safe surface and allowing it to evaporate. The H2O(l) will evaporate leaving NaOH(s) behind in the form of white crystals.)
Additional advice which is important with NaOH in-particular is to store the solution in a bottle that does not use a (ground) glass stopper. This is because NaOH dissolves glass. When in low concentrations this process precedes rather slowly, and may simply make the glass-on-glass stopper joint difficult to open. Stronger solutions are capable of freezing the joint permanently! (for an extreme example Sodium Hydroxide heated above its melting point to the liquid phase readily dissolves solid glass into a solution! This is not an experiment that should be attempted but only used for comprehension of why the phenomena occurs)
What else can I help you with?
What is the difference of dropping bottle and reagent bottle?
The reagent bottle is not used for dropping, having only a common stopper.
Why biuret reagent only kept in plastic bottle?
Biuret reagent should only be kept in a plastic bottle because it reacts with glass, which can contaminate the solution and give inaccurate results. Plastic is chemically inert and does not react with the reagent, ensuring the accuracy of the test results.
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.
How do you pick up a reagent bottle?
To pick up a reagent bottle, ensure your hands are clean and dry. Grasp the bottle around its body or neck, being careful not to touch the lid or the inside of the bottle to maintain the purity of the reagent inside. Lift the bottle carefully to prevent spills or breakage.
Why are some reagent bottle colored?
Reagent bottles are colored to protect light-sensitive chemicals or compounds from being degraded by exposure to light. The colored glass helps to block certain wavelengths of light that can cause chemical reactions or decomposition of the reagent inside the bottle.
What is the difference of dropping bottle and reagent bottle?
The reagent bottle is not used for dropping, having only a common stopper.
Why biuret reagent only kept in plastic bottle?
Biuret reagent should only be kept in a plastic bottle because it reacts with glass, which can contaminate the solution and give inaccurate results. Plastic is chemically inert and does not react with the reagent, ensuring the accuracy of the test results.
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.
How do you pick up a reagent bottle?
To pick up a reagent bottle, ensure your hands are clean and dry. Grasp the bottle around its body or neck, being careful not to touch the lid or the inside of the bottle to maintain the purity of the reagent inside. Lift the bottle carefully to prevent spills or breakage.
Why are some reagent bottle colored?
Reagent bottles are colored to protect light-sensitive chemicals or compounds from being degraded by exposure to light. The colored glass helps to block certain wavelengths of light that can cause chemical reactions or decomposition of the reagent inside the bottle.
Why is it important not to pipette a reagent solution directly from bottle of a reagent stock solution?
Pipetting directly from a reagent stock solution can lead to contamination of the stock solution. By introducing potential contaminants back into the stock solution, it can lead to inaccurate results in future experiments and compromise the integrity of the stock solution for other experiments. It's best practice to use a separate vessel to aliquot the required amount of reagent before transferring to the experiment.
Can a pipet be placed in a reagent bottle?
Yes, a pipet can be placed in a reagent bottle to withdraw specific volumes of the reagent as needed. It is important to ensure that the pipet tip does not touch the sides or bottom of the bottle to prevent contamination and maintain accuracy in volume measurement.
A dry and clean spatula is used to spoon out small amount of solid from a reagent bottle?
Using a dry and clean spatula helps prevent contamination of the reagent. Spooning out small amounts of solid ensures accurate measurement and avoids waste of reagent. Remember to close the reagent bottle tightly after use to maintain its integrity.
Why anthrone reagent needs to be kept cold before using?
Anthrone reagent is prepared in concentrated sulfuric acid. Adding reagents to acid causes immediate dissociation of the reagent and releases heat. If your solution weren't cold, it could generate enough heat to blow out of the flask or bottle.
What is the specific use of a medium sized reagent bottle?
Your question supplies its own answer, though you may need to ensure the bottle's material will withstand the intended reagent.
What is the use of re agent bottle in laboratory?
Stores each kind of chemicals, the reagent solution to use. Recently uses for in the petroleum chemical industry to replace the specimen bottle, makes specimen depositing to use.
What is the best way to obtain 5ml of liquid reagent from a large reagent bottle?
Use a graduated pipette or syringe to measure and transfer 5ml of liquid reagent from the large reagent bottle. Make sure to carefully handle and dispense the reagent to avoid spills and contamination.
