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How do you prepare PVA aqueous solution?
Denpending of the concentrations, you can use only mechanical agitation and elevate temperature for 5 to 15 minutes.
How do you prepare solution of different concert ration?
Take solution and mix different volumes with water as the final volume of all solutions is same
What is difference between stock and working solution?
A stock solution is a concentrated solution of a substance that is diluted to make working solutions of desired concentrations. A working solution is a solution ready for immediate use in an experiment or process. Stock solutions are typically stored for longer periods and used to prepare multiple working solutions.
What is a dilution tray?
A dilution tray is a laboratory tool used to prepare and manage multiple dilutions of a sample simultaneously. It typically consists of a series of wells or compartments where different concentrations of a solution can be created by mixing a stock solution with a diluent. This setup is useful in microbiology, biochemistry, and other fields for testing the effects of varying concentrations on reactions or microbial growth. Dilution trays help ensure consistency and efficiency in experiments involving multiple samples.
Why does the level of a more concentrated solution rise when two solutions of different concentrations are separated by a semipermeable membrane and when does it stop rising?
The more concentrated solution is hypertonic and osmotic pressure (a hydrostatic force whose sole purpose in life is to make concentrations equal) tends to move solvent into the more concentrated solution. It will stop rising when either a) the solution concentrations are the same on both sides of the membrane, or b) when the osmotic pressure becomes equal to the ambient air pressure.
How do you make a stock solution?
To make a stock solution, you need to dissolve a known mass of a substance in a known volume of solvent. This creates a concentrated solution that can be diluted to make solutions of different concentrations for experiments or applications.
What is a mixed anion standard solution?
It is a mixture of known concentrations of negatively charged ions. The standard solution is usually used to calibrate an instrument. The standard solution I use has 1000mg/L of 7 different anions; fluoride, chloride, nitrite as N, nitrate as N, phospate, sulfate, and bromide. I use this to calibrate an Ion Chromatograph that analyzes water for the presence of the anions.
What is the importance's of serial dilution in pharmacy?
Serial dilution is important in pharmacy to accurately prepare solutions of varying concentrations. By diluting a stock solution multiple times, pharmacists can create precise concentrations for medications or formulations. This method allows for more precise dosing, ensuring patients receive the correct amount of medication.
How do you prepare 0.02 m phosphate buffer?
To prepare a 0.02 M phosphate buffer, you would need to mix suitable amounts of a monobasic potassium phosphate and a dibasic potassium phosphate solution with water to achieve the desired concentration. Calculate the required volumes of each solution based on their respective concentrations and molar masses. Finally, adjust the pH as needed with the addition of acid or base.
How can prepare .01N KBr solution?
To prepare a 0.01N KBr solution, dissolve 0.74g of KBr in 1 liter of water. This will give you a solution with a molarity of 0.01N for KBr.
Why did chemists develop the concept of molarity?
It helps to quantify the concentration of solute in any solution - molarity is calculated by dividing the amount of solute by the total volume of the solution. The unit of molarity is moles/L.
How do you prepare 30 percent sucrose solution?
See the two Related Questions to the left for the answer.The first is how to prepare a solution starting with a solid substance (and dissolving it). The second question is how to prepare a solution by diluting another solution.
