1. Stoichiometry Project Pd5 3/18/10

2. Problem If 4.1 grams of Cr is heated with 9.3 grams of Cl 2, what mass of CrCl 3 will be produced? next

3. First Step Write out the formula Cr + Cr 2  CrCl 3 2Cr + 3Cr 2  2CrCl 3 3Cr + 3Cr 2  CrCl 3

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6. Second Step Starting out with 4.1g Cr, set up your first conversion factor.

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9. Third Step How many grams of CrCl 3 are made with 4.1 grams of Cr? 12.49gCrCl 3 13gCrCl 3 13.85gCrCl 3

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12. Fourth Step Given 9.3 grams of Cl 2, set up the first part of the equation.

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15. Fifth Step What comes after ?

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18. Sixth Step What is the last part of the equation?

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21. Seventh Step With your equation: What is the final answer? 12.49gCrCl 3 13.85gCrCl 3 11.24gCrCl 3

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24. Last Step What mass of CrCl 3 is produced from Cr and Cl 2 ? 12.49gCrCl 3 10.29gCrCl 3 13.85gCrCl 3

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26. If 4.1g of Cr is heated with 9.3g of Cl 2, what mass of CrCl 3 will be produced? 12.49 grams of CrCl 3