Analytical Chemistry Quiz

What do significant figures reflect in a measurement?

• Precision

• Accuracy

• Uncertainty

• Volume

Which rule states that non-zero digits are always significant in a measurement?

• Rule 4

• Rule 3

• Rule 1

• Rule 2

What is the SI unit for temperature?

• Fahrenheit

• Rankine

• Kelvin

• Celsius

What is the concentration unit expressed as mol/L or M?

• Molality

• Parts per million

• Percentage

• Molarity

What is the term for one part solute per one billion parts solvent?

• Parts per billion

• Molarity

• Parts per million

• Molality

What is the formula to convert milliliters to fluid ounces?

• 1 ml = 0.1 floz

• 1 ml = 0.2 floz

• 1 ml = 0.5 floz

• 1 ml = 0.033814 floz

What is the first question to consider when selecting an analytical method?

• How many samples are to be analyzed?

• What are the physical and chemical properties of the sample matrix?

• What accuracy is required?

• How much sample is available?

What does precision of a method indicate?

• The concentration range of the analyte

• How well the analytical result matches the true value

• How close the different measurements are

• The physical and chemical properties of the sample matrix

What is the measure of the amount of variation or dispersion in a set of values?

• Mean Value

• Standard Deviation

• Relative Standard Deviation

• Degree of Freedom

What is the formula to calculate the mean of the values 4, 6, 2, 8, and 5?

• (4+6+2+8+5)/5

• (4+6+2+8+5)/2

• (4+6+2+8+5)/4

• (4+6+2+8+5)/3