A somewhat infamous law (to me at least), that states:
$$a.A_{eq}=b.B_{eq}=c.C_{eq}=d.D_{eq}$$
for any and every balanced chemical equation -
$$a.A+b.B = c.C+d.D$$
where $i$ denotes the stoichiometric coefficient(/no. of moles) of the chemical species $I$ and $I_{eq}$ denotes the number of equivalents in 1 mole(/formula mass...?) of the chemical species $I$.
Am I wrong about any of the facts I've presented above? Please mention any errors you spot.
Assuming that I did fine, my simple question is,
What's the mathematical proof for this law?
I tried surfing online, but all I came across (with my not-so-deep searches) were verbal explanations of the law.
Is there no mathematical proof to this law whatsoever? I'll be satisfied to just find a proof, even if I don't understand the complicated math going into it (for I'm an eleventh grader).
Edit to provide an example:
$$\ce{2NaOH + H2SO4 -> Na2SO4 + 2H2O}$$
For A, $a \cdot A_{eq} = 2 \ (moles) × 1 \ (equiv.\ per\ mole) = 2$
For B, $b \cdot B_{eq} = 1 \ (moles) × 2 \ (equiv.\ per\ mole) = 2$
And this follows for other species, hence showing $a.A_{eq}=b.B_{eq}=c.C_{eq}=d.D_{eq}$