The density of ethanol was determined experimentally at 25°C in a series of trials to be 0.608 g/mL, 0.705 g/mL, and 0.689 g/mL. The accepted density of ethanol is reported to be 0.789 g/mL. calculate % error for this experiment. use the average experimental density in your calculation and report your answer to o. 0.1%.

Question

Chemistry

Reina Carr

23 August, 17:44

The density of ethanol was determined experimentally at 25°C in a series of trials to be 0.608 g/mL, 0.705 g/mL, and 0.689 g/mL. The accepted density of ethanol is reported to be 0.789 g/mL. calculate % error for this experiment. use the average experimental density in your calculation and report your answer to o. 0.1%.

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Answers (1)

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Karli Tanner · Answer 1

15.46%

0.667 g/mL (more o less) 0.052 g/mL (standard deviation)

Explanation:

To solve the problem, it is necessary calculate the average:

(0.608 g/mL + 0.705 g/mL + and 0.689 g/mL) / 3 = 0.667 g/mL

standard deviation = 0.052

Now, let us calculate the % error:

[ (0.789 g/mL - 0.667 g/mL) / 0.789 g/mL] * 100% = 15.46%