1. Stoichiometry Ashley Thomson Period 8 April 10, 2011 Begin!

2. Here’s the problem: Hydrochloric acid is added to 50.0g of iron (II) sulfide. What weight of hydrogen sulfide is produced? FeS + HCl FeCl + H S 2 What’s next? Balance the equation, of course. Ask Mr. Kirk! I need a hint.

3. Hydrochloric acid is added to 50.0g of iron (II) sulfide. What weight of hydrogen sulfide is produced? FeS + HCl FeCl + H S FeS + 2HCl FeCl + H S Now that you’ve balanced the equation, what’s next? 2 50.0g FeS 1 1 50.0g FeS 1 mol FeS

4. Hydrochloric acid is added to 50.0g of iron (II) sulfide. What weight of hydrogen sulfide is produced? FeS + 2HCl FeCl + H S Woo! You figured it out! Nice job. ;) One step down, a couple more to go. But can you do the next step? 50.0g FeS 1 x ? 2 1 mol FeS 50.0 g FeS 1 mol FeS 87.9g FeS 1 mol FeS 87.913g FeS

5. Hydrochloric acid is added to 50.0g of iron (II) sulfide. What weight of hydrogen sulfide is produced? FeS + sHCl FeCl + H S Nice job! You’ve made it this far, so why stop now? What’s next? 2 50.0g FeS 1 x 1 mol FeS 87.9g FeS x ? 1 mol H S 1 mol FeS 2 1 mol H S 2 1 mol FeS 1 mol HCl

6. Hydrochloric acid is added to 50.0g of iron (II) sulfide. What weight of hydrogen sulfide is produced? FeS + 2HCl FeCl + H S You’re on a roll! If you can do this one, then you’re almost done! So tell me, what do you do next? 2 50.0g FeS 1 x 1 mol FeS 87.9g FeS x 1 mol H S 1 mol FeS x ? 2 1 mol H S 34.1g H S 1 mol H S 2 2 2 2 33.1g H S 2 2

7. Answer: 50.0g FeS 1 x 1 mol FeS 87.9g FeS x 1 mol H S 1 mol FeS x 34.1g H S 1 mol H S = 19.4 g H S 2 2 2 2 Click me!

8. YOU DID IT! Congrats! Have a party hat! :D Buhh- bye now!

9. That’s a failed attempt. Stop guessing and go back and try again. Click me! oops

10. That’s a failed attempt. Stop guessing and go back and try again. Click me! oops2

11. That’s a failed attempt. Stop guessing and go back and try again. Click me! oops3

12. That’s a failed attempt. Stop guessing and go back and try again. Click me! oops4

13. I gave my last hint away for that kid right before you, who didn’t know what he was doing either. Let’s try this again.

14. Mr Kirk says: “If you don’t understand, I guess I’ll see you in study sessions soon.” I don’t think he wants to help at the moment, but if you listen to him and come in during study sessions, he’d be more then happy to help.