If 13.6 kilograms of al2o3 51.4 kilograms of naoh and 51.4 kilograms of hf react completely, how many kilograms of cryolite will be produced

The chemical reaction that occurs between , and to form cryolite (molecular formula: ) is:

The balanced reaction is:

In order to determine the weight of cryolite produced, the limiting reactant (the reactant that is completely used up in the reaction) should be identified first. To determine the limiting reactant, the number of moles of each reactant with respect to cryolite () should be calculated.

The formula for determining the number of moles is:

1. For :

According to the balanced equation, 1 mole of reacts to give 2 moles of .

Molar mass of

So,

Number of moles =  

2. For :

According to the balanced equation, 6 mole of reacts to give 2 moles of .

Molar mass of

So,

The number of moles =  

3. For :

According to the balanced equation, 12 moles of reacts to give 2 moles of .

Molar mass of

So,

Number of moles = .

Thus, is the limiting reactant.

Molar mass of

Amount of produced = =

Since,

Hence, the amount of cryolite produced is .

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