Given the reaction represented by the balanced equation Sn(s) + 2HF(aq) SnF 2 (s

Question

Given the reaction represented by the balanced equation
                  
Sn(s) + 2HF(aq) SnF2(s)+H2(g)

a. Calculate the number of grams of CHCl3 produced bymixing 105 g Cl2 with excess CH4.
b. If 10.0 g CHCl3 were produced, calculate the %yield.

Explanation / Answer

3Cl2 + CH4 =>  CHCl3 + 3HCl 105 g Cl2 *(1mol Cl2/ 71g) *(1 molCHCl3 / 3 mol Cl2) *(119 g CHCl3 /mol CHCl3) = 58.7 g CHCl3 Note: 71 g per mole of Cl2 3 moles of Cl2 react to form 1 mol CHCl3, so 1 molCHCl3 / 3 mol Cl2 molar mass of CHCl3 is 119 grams So convert mass of Cl2 to moles of Cl2. Convert moles of Cl2 tomoles of CHCl3. Convert moles CHCl3 to mass b) % yield = actual yield/ theoretical yield = 10.0 g/ 58.7 g =0.170 = 17.0%

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