# Is the reaction of calcium carbide with water a Brønsted-Lowry acid-base reaction or Lewis acid-base reaction?

Consider the following reaction:

$$\ce{CaC2 + 2H2O -> Ca(OH)2 + 2C_{2}H_{2}}$$

If it can be considered as an acid-base reaction, is it a Brønsted-Lowry (B.L.) reaction or a Lewis reaction?

If it is B.L., of course it is also Lewis; but I cannot understand if it can be B.L. in this case, since 2 protons are actually passed to the double carbon atom, but there is also the $\ce{Ca}$.

• Please don't use MathJax in the title field in the future. Also, you might want to read up on using the mhchem LaTex package :-) – paracetamol Jan 4 '18 at 19:46

That leaves the proton transfer, which can be described fully by the B-L theory. You actually have two reactions, successively forming $\ce{C2H-}$ and then $\ce{C2H2}$.