Chapter 3.4, Problem 2TY

Interpretation Introduction

Interpretation:

The uncertainty in the given $0.250\text{ M}$ ${\text{NH}}_{\text{3}}$ solution 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

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

Percent relative uncertainty:

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

To Calculate: The uncertainty in the given $0.250\text{ M}$ ${\text{NH}}_{\text{3}}$ solution