Volumetric flasks show no intermediate gradations, but they show a single mark to indicate, with high precision, the volume they contain when they are filled to that mark. For most volumetric devices, "filled to the mark" means filled until the bottom of the meniscus of the contents is exactly coincident with the mark. In lab you prepared a standard solution having a concentration of 7 ppm. Using a buret, you transferred the required amount (7 mL) of the 40 ppm stock solution into a 100.0mL volumetric flask, added 2.0 mL sodium citrate solution, 2.0 mL of hydroquinone solution, 3 mL of phenanthroline solution, and diluted with distilled water to the mark. When you were finished, the final volume in your solution was 0.5cm above the mark. The solution you prepared is __________________ Question 7 options: less than 7 ppm because you added less solvent than necessary. greater than 7 ppm because you added less solvent than necessary. less than 7 ppm because you added more solvent than necessary. 7 ppm because the amount of solvent does not determine concentration. greater than 7 ppm because you added more solvent than necessary.
Volumetric flasks show no intermediate gradations, but they show a single mark to indicate, with high precision, the volume they contain when they are filled to that mark. For most volumetric devices, "filled to the mark" means filled until the bottom of the meniscus of the contents is exactly coincident with the mark. In lab you prepared a standard solution having a concentration of 7 ppm. Using a buret, you transferred the required amount (7 mL) of the 40 ppm stock solution into a 100.0mL volumetric flask, added 2.0 mL sodium citrate solution, 2.0 mL of hydroquinone solution, 3 mL of phenanthroline solution, and diluted with distilled water to the mark. When you were finished, the final volume in your solution was 0.5cm above the mark. The solution you prepared is __________________ Question 7 options: less than 7 ppm because you added less solvent than necessary.
greater than 7 ppm because you added less solvent than necessary.
less than 7 ppm because you added more solvent than necessary.
7 ppm because the amount of solvent does not determine concentration.
greater than 7 ppm because you added more solvent than necessary.
AI-generated content may present inaccurate or offensive content that does not represent bartleby’s views.
Unlock instant AI solutions
Tap the button
to generate a solution
