Accurate volumetric measurement of a solution in a graduated cylinder is indicated by which of the following?

Rationale

Accurate volumetric measurement of a solution in a graduated cylinder is indicated by the bottom of the meniscus.

The bottom of the meniscus is the point at which the liquid's surface curve is lowest, providing the most accurate reading of the liquid level in a graduated cylinder. This method accounts for the adhesive forces between the liquid and the cylinder, ensuring precise measurements.

A (Top of the meniscus) YOUR ANSWER

The top of the meniscus does not provide an accurate reading because it is influenced by surface tension, which can cause the liquid to curve upwards. Using the top of the meniscus would lead to overestimating the actual volume of the liquid in the graduated cylinder.

B (Error of parallax) YOUR ANSWER

Parallax error refers to the apparent shift in position of an object viewed from different angles, which can occur if the eye is not level with the measurement mark. While it is a valid concern when taking measurements, it does not indicate a specific point for reading the volume, making it an incorrect choice.

C (Surface tension force) YOUR ANSWER

Surface tension affects the shape of the liquid's surface but does not provide a measurement point for accurate volumetric readings. It is a physical property that influences the meniscus's appearance rather than a method for determining the volume itself.

D (Bottom of the meniscus) CORRECT

The bottom of the meniscus is the correct point for measurement, as it represents the true volume of the liquid without the distortion caused by surface tension. This standard practice helps ensure consistency and accuracy in volumetric measurements.

Conclusion

For accurate volumetric measurements in a graduated cylinder, it is essential to read the bottom of the meniscus. This method eliminates the inaccuracies introduced by surface tension and parallax error, ensuring that measurements reflect the true volume of the liquid. Understanding the importance of this technique is crucial in scientific and laboratory settings to maintain precision in experiments and analyses.

Accurate volumetric measurement of a solution in a graduated cylinder is indicated by which of the following?

Accurate volumetric measurement of a solution in a graduated cylinder is indicated by the bottom of the meniscus.

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