what is the difference between molecular weight and equivalent weight?

Answer 1

Molecular weight is the mass of 1 mole computed with periodic table

When you want the mass of an equivalent, you must look the valence of your product in the experiment .if this valence is v , the mass of the equivalent is molecular weight /V

Ex ion Cu** you find molecular weight = 64

But the valence of Cu++ =2 so the equivalent mass is 64/2 =32

Answer 2

The empirical formula is the simplest ratio of elements in a compound. A molecular formula is actually how many of each are in one molecule. CH3 might be the empirical formula but the molecular formula might be C2H6. If you know the empirical formula and the molar mass of the molecule then calculate the molar mass of the empirical formula and divide it into the given molar mass of the molecule. if the answer is 2 then double the number of atoms to get the molecular formula. By the wat it is important to note that a molecular formula tells you little about the structure of a molecule, that is how the atoms are attached to each other.