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DATE: 10/ 15/ 15 TOPIC/ Objective :

Learn how to calculate uncertainty using +/- notation and percent error in chemistry fundamentals. Practice questions and steps included.

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DATE: 10/ 15/ 15 TOPIC/ Objective :

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  1. Unit 1: Chemistry Fundamentals: Matter & Measurements 1.6 AGENDA Do Now Introduction Mini-Lesson Summary Work Period Exit Slip DATE: 10/15/15 TOPIC/ Objective: I will calculate uncertainty using +/- notation and percent error. Essential question: How do I calculate uncertainty? DO NOW: Complete Do Now sheet. You have 5 minutes.

  2. Unit 1: Chemistry Fundamentals: Matter & Measurements 1.6 How do I calculate uncertainty?

  3. Unit 1: Chemistry Fundamentals: Matter & Measurements 1.6 How do I calculate uncertainty?

  4. Unit 1: Chemistry Fundamentals: Matter & Measurements 1.6 How do I calculate uncertainty? QUESTION Rules for calculating uncertainty for addition & subtraction for +/- symbol NOTES • An Absolute Uncertainty is shown by symbol “∆“ and has the same units as measurement • ADD the Absolute Uncertainties Example: Add: (6.5±0.5)m+(3.3±0.1)m=(9.8±0.6)m Subtract: (6.5±0.5)m (3.3±0.1)m=(3.2±0.6)m

  5. Unit 1: Chemistry Fundamentals: Matter & Measurements 1.6 How do I calculate uncertainty? Practice Questions • (44.8  .7) + (98.66  .05) = • (88.64  .02) + (53.8  0.4) = • (245.871  .001) + (78.88  .05) = 4. (952.90  .09) – (458.34  .05) =

  6. Unit 1: Chemistry Fundamentals: Matter & Measurements 1.6 How do I calculate uncertainty? QUESTION Rules for calculating uncertainty using percent error NOTES • Percent error formula • Measured value: value that you measured in an experiment or situation • Accepted value: the correct value accepted by science

  7. Unit 1: Chemistry Fundamentals: Matter & Measurements 1.6 How do I calculate uncertainty? QUESTION Steps when using a formula: FLiPS NOTES • F = Formula • Li = List variables • P = Plug in numbers • S = Solve formula

  8. Unit 1: Chemistry Fundamentals: Matter & Measurements 1.6 How do I calculate uncertainty? Sample Question #1

  9. Unit 1: Chemistry Fundamentals: Matter & Measurements 1.6 How do I calculate uncertainty? Sample Question #2

  10. Unit 1: Chemistry Fundamentals: Matter & Measurements 1.6 How do I calculate uncertainty? QUESTION Two questions I have are… NOTES 1. 2. SUMMARY:

  11. Unit 1: Chemistry Fundamentals: Matter & Measurements 1.6 How do I calculate uncertainty? HOMEWORK: • Finish classwork of 1.6 • Write a summary of today’s lesson • Create two questions • Highlight important information from the lesson

  12. Unit 1: Chemistry Fundamentals: Matter & Measurements 1.6 How do I calculate uncertainty? EXIT SLIP Make sure you get your trackers checked!

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