EDTA is a very important analytical molecule used to complex divalent metals in order to determine their concentration in a solution. The following reaction takes place:

EDTA^ 4 (aq) +Ca^+2 (aq) [EDTA(Ca)]^ 2 .

What is the concentration of Calcium in the tap water 250.0 mL of the tap water sample is titrated to the endpoint with 3.19 of 0.0500 M EDTA?

answer: option (b) is the correct answer.

explanation:

a covalent bond is formed by sharing of electrons. whereas polarity arises due to difference in electronegativity of two atoms.

therefore, more is the electronegativity of an atom which combines with the titanium, more readily it will induce a partial positive and negative charge.

thus, out of the given options fluorine is most electronegative and has an incomplete octet. therefore, it will readily combine with titanium to share the electrons and complete its octet.