Transcript Lesson 057
Lesson 057 Learning Goal: (You should be able to…) read and interpret graphs Success Criteria: (Can you …) Interpret a graph depicting the relationship between the solubility and temperature by answering some questions Interpret a graph depicting the relationship between the amount of solute dissolving and time by answering some questions How to organize lesson 057 The lessons Agenda was: • Read several different graphs and interpret the data • Answer questions about the graph’s contents Vocabulary • • • • • • • Solid Liquid Gas Element Compound Homogeneous mixture Heterogeneous mixture • • • • • • • Solute Solvent Solution Suspension Rate Dissolve Saturated Write to Think 057 PLEASE PLACE YOUR SIGNED RELEASE FORM (if you have it!) ON THE CORNER OF YOUR LAB BENCH … THANK YOU! 1.What should all graphs have? 2.What are the purposes of graphs? 3.Where (which axis) are the dependent and independent variables usually placed on a graph? 4.Sketch a graph of your height over time. Tips for reading a graph 1. Start in the top left corner .. Just like reading! 2. Read the title of the graph. 3. Read the labels with units in the y axis (vertical). Is this the dependent or independent variable? 4. Read the labels with units in the X axis (horizontal). Is this the dependent or independent variable? 5. So what is the graph about? What is it trying to show? 6. Identify the range of data on both axes. 7. Identify the intervals of the data on both axes. 8. Read any points, lines, boxes. 9. Are there any outliers? 10. Is the line straight? Curved? Slope up or down? Questions graph 1 1. So what is the graph about? What is it trying to show? 2. What’s the solubility of sugar and salt at 20oC? 3. How does the solubility of salt change from 30oC to 70oC? 4. How does the solubility of sugar change from 30oC to 70oC? 5. Infer what the solubility of sugar will be if the water is at -20oC? 6. Which substance is more soluble at 00 C ? Graph 2 1. 2. 3. 4. Read the graph! FYI: 1ml of water = 1g of water What are the dependent and independent variables? So what is the graph about? What is it trying to show? What mass of potassium nitrate is needed to saturate a water solution at 400 C? 5. Does the solubility increase at the same rate with every 200C increase in temperature? 6. At which temperature shown in the graph is potassium nitrate least soluble in water? 7. Predict the solubility of the potassium nitrate at 1200C GRAPH 3: Effect of protective coating of aspirin tablets with acrylate/methacrylate copolymers on tablet disintegration and dissolving rates Drug release profiles from aspirin tablets: uncoated (circle) coated with Polymer A (triangle) coated with Polymer B (square) Questions about graph 3 1. So what is the graph about? What is it trying to show? 2. What happens to the drug release of polymer coated aspirin tablets with time? 3. At what time is the maximum amount of aspirin released for polymer A? 4. At 1 hour what is the DIFFERENCE in the amount of aspirin released by the polymer A coated aspirin tablets compared to the the polymer B coated aspirin tablets? 5. How does the coating of the aspirin tablets affect the amount of aspirin released? End of lesson Solubility curve of potassium nitrate (KNO3)