# Pure Water

Chemistry Level 3

For pure water at 25 degree celcius , the correct options are

A. $$\ce{[H2O]}$$ = 55.56 $$\text{ mol } {dm}^{-3}$$ if density of water is 1 $$\text{ g} {cm}^{-3}$$

B. $${K}_{w}$$ = $${10}^{-14} {(\text{ mol } {dm}^{-3})}^{2}$$

C. Degree of dissociation = 1.8 $$\times$$ $${10}^{-9}$$

D. Ionisation constant , $${K}_{ionisation}$$ = 1.8 $$\times$$ $${10}^{-16}$$.

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