CH3202 Quiz 1

It involves the measurement of such electrical properties as voltage, current, resistance, and quantity of electrical charge.

• Gravimetric methods

• Electroanalytical methods

• Volumetric methods

• Spectroscopic methods

Describe the accuracy and precision the following set of data.

True value: 10 points

3 points, 5 points, 8 points, 9 points

• accurate - precise

• not accurate - not precise

• not accurate - precise

• accurate - not precise

Which reveals chemical identity of elements and compounds in a sample?

• Quantitative Analysis

• Qualitative Analysis

There are six steps in a quantitative analysis. The first step is.........................

• design experimental procedure

• identify and define problem

• analysis

• select method

Which of the following is an example of quantitative analytical method?

• 
  Pop sound upon insertion of burning splint

• 
  Testing the basicity of soil using blue litmus paper

• 
  Testing the acidity of soda drinks using red litmus paper

• 
  

  reading pH of drinking water using a pH probe

Which of the following is used to calculate the accuracy of a set of experimental results?

• Standard deviation

• Variance

• Absolute Error

• Range

Precision is divided into two categories:

• Reproducibility and Repeatability

• 
  Repeatability and Responsibilty

• 
  Repeatability and Resonability

• 
  

  Reproducibility and Responsibility

What is precision in the context of measurements?

• The ability of a measurement to reflect the true value

• The consistency and repeatability of measurements

• The closeness of measurements to the actual value

• The degree of error in a measurement

This bullseye demonstrates...

• High Accuracy & High Precision
• High Accuracy & Low Precision
• Low Accuracy & High Precision
• Low Accuracy & Low Precision

Describe the accuracy and precision of the image

• Accurate and Precise
• Accurate and not precise
• Not Accurate and Precise
• not accurate and not precise