Question

Calculate the amount of zirconium produced (in kg) if a reactor were charged with 369.0 kg ZrCl4 and 35.0 kg Na.

Answer 1

First you need equation of reaction:

ZrCl4 + 4 Na -> Zr + 4 NaCl

signs of states of matter are missing, salts are usually solid.
If temperature is high enough, Na is liquid.

So, calculate number of moles of both reactants.
e.g. amount of Na is 35 000 g / 22.99 g/mol = 1522.4 moles.

Then compare amounts of moles for finding limiting reactant.
According to equation of reaction, amount of Na should be four times
amount of ZrCl4.

When you know which is limiting reactant,
calculate amount of moles of Zr.

Then mass of product is m = n x M(Zr)