This document discusses accuracy, precision, and significant figures in measurement. It defines accuracy as how close a measurement is to the true value, and precision as how close repeated measurements are to each other. It then explains that significant figures refer to the useful digits in a measurement when written in scientific notation. The document outlines some key rules for determining the number of significant figures in a measurement, such as non-zero digits being significant but leading zeroes not, and zeroes between numbers or after a decimal being significant. It encourages practicing applying these rules to measurements.

3. ACCURACY
AND
PRECISION
GENERAL CHEMISTRY 1

4. 01
02
03
LEARNING OBJECTIVES
Differentiate
the accuracy
and pricision;
Explain what
significant
figures are in
measurement;
Determine the
number of
significant figures
in any
measurement.

5. ACCURATE!

6. ACCURACY
• It is the closeness of
measured value to the true
value.

10. PRECISION
• It is the closeness of multiple
observations to one another,
or the repeatability of
measurement.

14. WILL WE NOW PROCEED!

15. SIGNIFICANT FIGURE
The term “significant figures” refers to the
number of important single digits (0 to 9
inclusive) in the coefficient of expression in
the scientific notation.

16. RULES OF
SIGNIFICANT FIGURE
There are certain rules which need to
be followed to measure the
significant figures of a calculated
measurement.

17. • Those digits which are non-
zero are significant.
For example, in 6575 cm there are four significant figures
and in 0.543 there are three significant figures.

18. • Leading zeroes are not
significant.
For example, in 0.005 there is only one and the
number 0.00232 has 3 figures.

19. • Zeroes between non zero
numbers are significant.
For example; 4.5006 has five significant figures.

20. • Zeroes at the right side of the
decimal point and To the right
of non zero digit are also
significant.
For example; 0.500 has three significant figures.

21. • Powers of ten are not
significant.
For example: 1.50 × 10² = 3 significant
figures and in 3.0 × 10³ = 2 significant
figures.

24. ACTIVITY!

27. Lets Check!

30. EVALUATION
Answer the following questions….

31. Part I.

32. Part II.