Calculate the normality of NaOH solution Formed by dissolving 0.2
gm NaOH to make 250 ml solution

Given Data:

mass of solute= 0.2

volume of solution: 250ml

Normality=?

Explanation:

250ml  =0.25dm3    Volume

m.mass of NaOH= 40g/mol

Equivalent weight of solute=40/1   =40

N=mass in g of solute/equivalent weight of solute*Volume of solution

N=0.2/40*0.25

N= 0.02

the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.

"among the transition metal elements, manganese and zinc have a slight lowering of electronegativities. the reason behind this is that the nuclear charges of these elements are slightly weaker than the other transition metal elements due to the way their valence electrons are filled up. both manganese and zinc have their valence electrons filled up to the 4th shell with 1 pair of electrons (4s2) completely occupying it. although the electrons in the 3rd shell (3d) are yet to be paired since the outer most shell is filled up, the ability of the nucleus to attract electrons is lessened. hence,   the electronegativity (or the ability to attract electrons) is lessened."