Question

A student determines the density of an unknown liquid by weighing a sample of known volume. The reported density is found by the instructor to be significantly higher than it should be. Which of the following experimental errors could account for this result?
A. The pipet used was filled to a level above the calibration mark.
B. The balance was read incorrectly, and the recorded sample mass was lower than the true sample mass.
or
C. A part of the sample was spilled from the beaker before it was weighed.

Answer 1

Answer: C. A part of the sample was spilled from the beaker before it was weighed.

Explanation:

Density is defined as the mass contained per unit volume.

$Density=\frac{mass}{Volume}$

Density is directly related to mass and inversely related to volume. Thus if density is measured to be higher than it should be , it could be due to more mass or less volume.

Thus errors could be a part of the sample was spilled from the beaker before it was weighed.

Answer 2

The correct option is C. A part of the sample was spilled from the beaker before it was weighed.

The following information should be considered:

• Density refers to the mass contained per unit volume.
• Density is directly related to mass and inversely related to volume.

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