Question

Question #90724

Answer 1

You figure out the amount of `"O"_2` to react with 1 mol of `"H"` atoms.

Explanation:

We can define an equivalent as the amount of a substance that can combine with or displace one mole of hydrogen atoms.

However, the number of equivalents depends on the reaction involved.

Consider this reaction.

`"2H"_2 + "O"_2 → 2"H"_2"O"`

It takes 4 mol of `"H"` atoms to react with 1 mol of `"O"_2`.

So, 1 mol of `"H"` atoms reacts with 0.25 mol of `"O"_2`.

∴ 1 eq of `"O"_2` = 0.25 mol of `"O"_2`.

Now, consider this reaction.

`"H"_2 + "O"_2 → "H"_2"O"_2`

It takes 2 mol of `"H"` atoms to react with 1 mol of `"O"_2`.

So, 1 mol of `"H"` atoms reacts with 0.5 mol of `"O"_2`.

In this reaction, 1 eq of `"O"_2` = 0.5 mol of `"O"_2`.