Question

Find both the experimental error and the percent error if the known value is 200 mL and the experimental value is 195 mL.

a. 5 mL, 2.5%
b. 2 mL, 1%
c. 5 mL, 2%
d. 2 mL, 1.5%

Answer 1

The experimental error is the absolute value of the difference between the experimental value and the known value, yielding 5 mL. The percent error is calculated by dividing the experimental error by the known value and then multiplying it by 100%, resulting in 2.5%. Option a (5 mL, 2.5%) is correct.

Step-by-step explanation:

To find both the experimental error and the percent error, we follow these formulas:

• Experimental Error = Experimental Value - Known Value
• Percent Error = (|Experimental Error| / Known Value) x 100%

In this case, the known value is 200 mL, and the experimental value is 195 mL.

So,

1. Experimental Error = 195 mL - 200 mL = -5 mL (we take the absolute value, so it's 5 mL)
2. Percent Error = (5 mL / 200 mL) x 100% = 2.5%

Therefore, the correct answer is 5 mL, 2.5%, which is option a.