1. Introduction to Chemistry, SC155 Unit 8 Seminar Instructor Etheredge

2. Overview Announcements Mini Project #3 Carbon Monoxide

3. Mini Project #3 Only need to use 1 formula Molarity (M) = moles Liter Example: 6 M = 6 moles HCl 1 L 1 mol NaOH neutralizes 1 mol HCl – 1:1 ratio monoprotic (only 1 H is present)

4. Example Problem Suppose you have used 25 mL of a 0.02 M solution of NaOH in a back-titration. How many moles of NaOH did you use? Step 1: What information is given?

5. Example Problem Suppose you have used 25 mL of a 0.02 M solution of NaOH in a back-titration. How many moles of NaOH did you use? Step 1: What information is given? volume NaOH = 25 mL Molarity NaOH = 0.02 M

6. Example Problem Suppose you have used 25 mL of a 0.02 M solution of NaOH in a back-titration. How many moles of NaOH did you use? Step 1: What information is given? volume NaOH = 25 mL Molarity NaOH = 0.02 M Step 2: What information are you trying to find?

7. Example Problem Suppose you have used 25 mL of a 0.02 M solution of NaOH in a back-titration. How many moles of NaOH did you use? Step 1: What information is given? volume NaOH = 25 mL Molarity NaOH = 0.02 M Step 2: What information are you trying to find? moles NaOH = ?

8. Example Problem (cont’d) Remember, our formula is Molarity = moles Liter Volume is in mL, so we need to convert to L.

9. Example Problem (cont’d) Remember, our formula is Molarity = moles Liter Volume is in mL, so we need to convert to L. 25 mL 1 L0.025 L 1000 mL

10. Example (cont’d) Given:Needed: Volume = 0.025 Lmoles = ? Molarity = 0.01 M Step 3: Plug in for our known values and solve for our unknown values.

11. Example (cont’d) Given:Needed: Volume = 0.025 Lmoles = ? Molarity = 0.01 M Step 3: Plug in for our known values and solve for our unknown values. Molarity = mol 0.02 M = ? mol Liter 0.025 L

12. Example (cont’d) Given:Needed: Volume = 0.025 Lmoles = ? Molarity = 0.01 M Step 3: Plug in for our known values and solve for our unknown values. Molarity = mol 0.02 M = ? mol Liter 0.025 L Cross multiply to solve: (0.02 M)(0.025 L) = ? mol 0.0005 = ? mol

13. Carbon Monoxide Do you have any personal stories regarding carbon monoxide that you would like to share?

14. Carbon Monoxide Do you have any personal stories regarding carbon monoxide that you would like to share? What physically happens within our bodies when we breathe CO?

15. Carbon Monoxide Do you have any personal stories regarding carbon monoxide that you would like to share? What physically happens within our bodies when we breathe CO? What are the physical effects of CO poisoning at low versus high doses?

16. Carbon Monoxide As a medical professional, how might you treat a person suffering from CO exposure?

17. Carbon Monoxide As a medical professional, how might you treat a person suffering from CO exposure? Where are your CO detectors located? Why?

18. Carbon Monoxide As a medical professional, how might you treat a person suffering from CO exposure? Where are your CO detectors located? Why? Do you think the risk of CO exposure is greater at different times of the year? Why?