Question

why it is appropriate to use the term formula weight instead of molecular weight in case of NaCl​

Answer 1

Answer:

Some compounds do not exist as individual molecules. For example, there is no such thing as a molecule of sodium chloride. That's why it is appropriate to use the term formula weight for this type of compound. ... So it is appropriate to use the term molecular weight for it.

Answer 2

NaCl is an ionic compound and has no molecular entity therefore it is imperfect to define the molecular weight.

Explanation:

• NaCl is an ionic compound and has no molecular entity therefore it is imperfect to define the molecular weight.
• Formula weight is used for NaCl as it is an ionic compund.
• Sodium chloride do not exist as individual molecules.
• Therefore, it is appropriate to use the term formula weight for this type of compound.
• However, some compounds do exist as individual molecules.
• For example, water,carbon-dioxide etc and the term molecular weight is used for them.