Sodium hypochlorite, naocl, is the active ingredient in household bleach. what is the concentration of hypochlorite ion if 20.00 cm3 of bleach requires 25.30 cm3 of 0.500 m hcl to reach the equivalence point?
a. 1.13 m
b. 0.132 m
c. 0.395 m
d. 0.632 m

Answer : The correct option is, (d) 0.632 M

Explanation : Given,

Concentration of HCl = 0.500 M

Volume of HCl =

conversion used :

Volume of hypochlorite ion =

The chemical reaction will be:

First we have to calculate the moles of ion.

From the reaction we conclude that,

Moles of = Moles of = 0.1265 mol

Now we have to calculate the concentration of hypochlorite ion.

Therefore, the concentration of hypochlorite ion is 0.632 M.

it is the most commonly accepted one

nacl or sodium chloride is an ionic compound. this is because an ionic compound pertains to a compound that consists of positively and negatively charged ions. in this case, na (sodium) has a tendency to lose one electron when it reacts with with other atoms, so the resulting sodium ion contains 11 protons and 10 electrons, thus making it positively charged (na+), when chlorine reacts, it usually gains one electron to form an ion called chloride, thus making it negatively charged ( since the ions are oppositely charged, they attract.