Chemistry

Kindly consider the following Image

Gypsum $\stackrel{393\mathrm{K}}{?}{\mathrm{C}\mathrm{a}\mathrm{S}\mathrm{O}}_4\frac{1}{2}{\mathrm{H}}_2\mathrm{O}$

At a fixed temperature, $\mathrm{X}$ $$ having more vapour pressure as compared to $$ $\mathrm{Y}$ . So, intermolecular interaction is lower as compared to $\mathrm{Y}$ $$ .

$\mathrm{}{}_{26}\mathrm{F}\mathrm{e}=\left[\mathrm{A}\mathrm{r}\right]3{\mathrm{d}}^{6}4{\mathrm{S}}^2$

Among Ni, Co, Mn, Fe

Fe having minimum third ionization energy

Except ${\mathrm{O}}_2$ , remarginal ${\mathrm{C}\mathrm{O}}_2,{\mathrm{O}}_3,{\mathrm{H}}_2\mathrm{O},\mathrm{C}\mathrm{F}\mathrm{C}\mathrm{s}$  are green house gases

$\mathrm{}\left. [\mathrm{M}{\mathrm{a}}_3{\mathrm{b}}_3\right]$  - type complex compound show fac-and mer-isomer.

$\therefore \left. [\mathrm{C}\mathrm{o}{\left({\mathrm{N}\mathrm{H}}_3\right)}_3{\left({\mathrm{N}\mathrm{O}}_2\right)}_3\right]$

In a hydrogen atom, which we know has a single electron, the orbital energy will only depend on the principal quantum number (n). Here, the orbitals like 2s and 2p have the same energy (degenerate).

It's a little different with multielectron atoms. The energy depends on both n and the azimuthal quantum number (l). This causes splitting. And, the energies increase in the order: s < p < d < f.

$500\mathrm{m}\mathrm{L}$ has $\mathrm{H}\mathrm{C}\mathrm{l}=25*{10}^{-3}\mathrm{m}\mathrm{o}\mathrm{l}=25\mathrm{m}\cdot \mathrm{m}\mathrm{o}\mathrm{l}$

$120\mathrm{m}\mathrm{L}$ has $=1\mathrm{m}\cdot \mathrm{m}\mathrm{o}\mathrm{l}$

and $500\mathrm{m}\mathrm{L}$ has ${\mathrm{C}\mathrm{H}}_3\mathrm{C}\mathrm{O}\mathrm{O}\mathrm{H}=\frac{1}{20}*{10}^3\mathrm{m}\cdot \mathrm{m}\mathrm{o}\mathrm{l}$

so $20\mathrm{m}\mathrm{L}$ has $\frac{{10}^3}{20}*\frac{20}{500}=2\mathrm{m}\cdot \mathrm{m}\mathrm{o}\mathrm{l}$

$\mathrm{N}\mathrm{a}\mathrm{O}\mathrm{H}$ added in $20\mathrm{m}\mathrm{L}$ is $5*\frac{1}{2}=2.5\mathrm{m}\cdot \mathrm{m}\mathrm{o}\mathrm{l}$

So, $\mathrm{N}\mathrm{a}\mathrm{O}\mathrm{H}$ (left) $+{\mathrm{C}\mathrm{H}}_3\mathrm{C}\mathrm{O}\mathrm{O}\mathrm{H}?{\mathrm{C}\mathrm{H}}_3\mathrm{C}\mathrm{O}\mathrm{O}\mathrm{H}+{\mathrm{H}}_2\mathrm{O}$
1.5
2
1.5

$\Rightarrow \mathrm{p}\mathrm{H}={\mathrm{p}}^{{\mathrm{K}}_{\mathrm{a}}}+\mathrm{l}\mathrm{o}\mathrm{g}?\frac{\text{salt}}{\text{acid}}=4.75+\mathrm{l}\mathrm{o}\mathrm{g}?0.4771=5.2271$