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Lelechka [254]
3 years ago
11

How many grams of Bromine are required to react completely with 11.95 grams aluminum chloride? AlCl3+Br2-->AlBr3+Cl2

Chemistry
2 answers:
liberstina [14]3 years ago
6 0
First have to balance the equation of  AlCl3 + Br2 ---> Br3 + Cl2:

                                  2AlCl3 + 3Br3----> 2AlBr3 + 2Cl2

                           1 mol AlCl3           3mol Br2         159.8 g Br2                         11.95g AlCl3   x  ---------------      x    -------------     x  --------------- =  21.48g Br2
                          133.33 g AlCl3      2 mol AlCl3       1 mol Br2


(133.33 g = molar mass of AlCl3       3:2 ratio   
159.8 g = molar mass of Br2)

Answer: 21.48 g Br2 required 
zmey [24]3 years ago
5 0
Molar mass:
 
( Br₂ ) = 159.80 g/mol

AlCl₃ = 133.34 g/mol

<span>2 AlCl</span>₃<span> + 3 Br</span>₂<span> = 2 AlBr</span>₃<span> + 3 Cl</span>₂

2 x ( 133.34) g ------------ 3 x ( 159.80) g
11.95 ------------------------ ( mass Bromine )

mass Bromine = 11.95 x 3 x 159.80 / 2 x 133.34

mass Bromine = 5728.83 / 266.68

mass Bromine = 21.48 g

hope this helps!


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