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Thinking Critically About Moles

Thinking Critically About Moles. Knowledge Level Show your knowledge of the mole concept by labeling the Mole Map graphic organizer. Use the colored pencils to color-code your organizer. RED = COUNTING PARTICLES BLUE = WEIGHING SUBSTANCES GREEN = AMOUNT OF SPACE TAKEN BY A GAS.

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Thinking Critically About Moles

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  1. Thinking Critically About Moles • Knowledge Level • Show your knowledge of the mole concept by labeling the Mole Map graphic organizer. • Use the colored pencils to color-code your organizer. • RED = COUNTING PARTICLES • BLUE = WEIGHING SUBSTANCES • GREEN = AMOUNT OF SPACE TAKEN BY A GAS

  2. Thinking Critically About Moles • Comprehension Level • Sage and Scribe Activity: • A sage is defined as a “profoundly wise man.” • A scribe is a “record-keeper”. • Directions: Solve the two problems together. One partner will be the sage for the first problem. The sage will describe step-by-step what the scribe should be writing to solve the problem. The scribe can only record what is clearly explained by the sage. For the second question, the partners will exchange roles.

  3. Thinking Critically About Moles • Application Level • Use the conversion factors illustrated and explained on the Mole Map to compute solutions to the following. Show all of your work. • Calculate the number of grams of iron that contain the same number of atoms as 2.24 g of cobalt. (pg 214 #57) • Calculate the number of grams of cobalt that contain the same number of atoms as 2.24 g of iron. (pg 214 #58) • Show your knowledge of the mole concept by solving at least four of the problems on the handout. Show all of your work.Check your answers against the key provided.

  4. Thinking Critically About Moles • Analysis Level • Combine 0.20 moles of sodium chloride with 1 mole of water. • Show all of your needed calculations, and write a list of numbered steps to record your actions. (You don’t have to describe the calculations…just your lab materials and process.) • On a balance weigh about 100-200 tiny crystals of sugar, sucrose, C12H22O11 . Record the weight. Calculate how many molecules of sugar, and how many carbon, hydrogen, and oxygen atoms are in this tiny amount. • On a regular balance weigh 0.0235 mol of sucrose, C12H22O11 . Show the calculations to Mrs. Tarvin before weighing! • On a regular balance weigh 0.0235 mol of table salt, NaCl. Show the calculations to the instructor before weighing!

  5. Thinking Critically About Moles • Evaluation Level • Recognizing Mistakes: • The student who solved the three mole conversion problems made a few mistakes. On your own paper, solve the problems correctly, and write a sentence or two explaining the student’s error. • Think about how you will avoid making these common errors in your own work.

  6. Thinking Critically About Moles • Synthesis Level • Consider a 5.0 gram sample of nickel and a 6.0 gram sample of an unknown metal. There are exactly 1/2 as many atoms of the unknown as in the 5.0 gram sample of Ni. What is the unknown metal?

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