Chapter 3, Problem 3.EE

Interpretation Introduction

Interpretation:

The uncertainty in $\text{mL}$ solution leading to $2\%$ uncertainty in $\text{mol HCl}$ has to be calculated

Concept Introduction:

Uncertainty:

Uncertainty means state of not certain in predicting a value.  In a measured value, the last digit will have associated uncertainty. Uncertainty has two values, absolute uncertainty and relative uncertainty.

Absolute uncertainty:

Expressed the marginal value associated with a measurement

Relative uncertainty:

Compares the size of absolute uncertainty with the size of its associated measurement

$\text{Relative uncertainty = }\frac{\text{absolute uncertainty}}{\text{magnitude of measurement}}$

For a set measurements having uncertainty values as $e_1,e_2\text{ and }{e}_3$, the uncertainty $(e_4)$ in addition and subtraction can be calculated as follows,

$e_4=\sqrt{e_1^2+e_2^2+e_3^2}$

Percent relative uncertainty:

$\text{Percent relative uncertainty = 100 }\times \text{ relative uncertainty}$

To Calculate: The uncertainty in $\text{mL}$ solution leading to $2\%$ uncertainty in $\text{mol HCl}$