one sodium hypochlorite molecule (molecular weight of 74.44) reacts with one molecule of sodium metabisulfite (molecular weight of 190.1), you'll need two and a half grams of metabisulfite for every...
Add an acid and a few drops of phenolphthalein indicator and when the pink color dissappears the solution is neutral - or at least extremely close.
Yes, there is nothing special about it that prevents any acid from neutralising it.
Yes, it does neutralize acids but not strong acids. Sodium bicarbonate has one basic use and that is its use as a mild antiseptic.
Sodium thiosulfite reacts with iodine in an oxidation-reduction reaction, causing it to appear colorless in the presence of starch indicator solution.