How many moles of Nacl will be formed from the combination of 1 mole of Na and cl each. What will be the excess reactants in the chemical reaction.

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Solution

The reaction is,

2 Na + Cl2 → 2 NaCl

( that is, 2 mol of Na react with 1 mol of Cl2 to form 2 mol NaCl.)

— here 1 mol of Na and 1 mol of Cl2 are only there.

.˙. 1 mol of Na react with 0.5 mol of Cl2 to form 1 mol NaCl

Moles of NaCl formed = 1 mol

=> The excess reactant is the Cl2
because only 0.5 mol Cl2 is used.
The other 0.5 mol Cl2 is excess.

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