The same 500-mL buret is used to deliver five 350-mL aliquots of a solution to s

Question

The same 500-mL buret is used to deliver five 350-mL aliquots of a solution to separate flasks. What is a source 5· of imprecision in these measurements? (A) The buret has an imperfection on the inside at about (B) The buret has a linear volume scale printed on it, but the 10.0 mL mark. the diameter of the buret tube decreases linearly toward the lower part of the buret. The solution temperature and room temperature are the same, but they are different from the temperature printed on the label of the buret. (C) (D) The temperature of the solution varies by several degrees among measurements.

Explanation / Answer

This question is regarding the possible error in drawing aliquots from a buret.

A) The buret has an imperfection on the inside at about the 10 mL mark.

This option is not correct. Because there is no such imperfection can be seen.

B) The buret has a linear volume scale printed on it, but the diameter of the buret tube decreases linearly toward the lower part of the buret.

This option is also not correct. Becuase, there is no decrease in the diameter of the buret.

C) The solution temperature and room temperature are the same, but they are different from the temperature printed on the label of the buret.

This option is correct. Becuase, there might be the manufacture label the buret at a different temperature than the laboratory temperature. Hence, this option is correct.

D) The temperature of the solution varies by several degrees among measurements.

This option is also not correct. Becuase, the measurements were carried out in a single day experiment and there may not be that much variation in the temperature of solutions.

Hence, the answer is: C

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.