If the accuracy is not critical use a measuring cylinder to save time. A clean volumetric flask. A volumetric flask is a piece of laboratory glassware used to prepare and measure chemical solutions. The resulting solution contains the amount of solute originally taken from the stock solution but disperses that solute throughout a greater volume. A container of pure solvent, the same solvent used to make the original solution, such as water. To make your solution, pour 25 ml of stock solution into a 50 ml volumetric flask. When using a volumetric flask for dilution or solution preparation, avoid the temptation to save time by overfilling the volumetric flask before resorting to a pasteur pippete or ommitting using a pasteur pipette altogether, to bring the level up to the graduation mark. A way of adding the pure solvent to the volumetric flask, for example a glass funnel and a pasteur pipette. A volumetric flask is a piece of laboratory glassware used to prepare and measure chemical solutions. The final volume of the dilution will be 100 mL (1 mL of stock solution plus 99 mL of diluent, the solution used for diluting). Dilute it with solvent to the 50 ml line. To make a dilution, you simply add a small quantity of a concentrated stock solution to an amount of pure solvent. Avoid This Common Dilution Mistake For example, a 1 to 100 dilution in chemistry requires the use of a 1.0 mL volumetric pipette and a 100 mL volumetric flask. Dilute it with solvent to the 50 ml line.
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