Question

is negitive ph value possiable

Answer 1

is negative ph value possible?

Solution

The constant of dissociation of water is $1\cdot 10^{-14}$

As far as the $\mathsf{ph} = -\log [\mathsf{H}]^{+}$ and $\mathsf{pOH} = -\log [\mathsf{OH}]^{-}$

$$[ \mathrm {O H} ] ^ {-} \cdot [ \mathrm {H} ] ^ {+} = 1 0 ^ {- 1 4}; - \log [ \mathrm {H} ] ^ {+} - \log [ \mathrm {O H} ] ^ {-} = - \log (1 0 ^ {- 1 4}); \mathrm {p O H} + \mathrm {p H} = 1 4;$$

So, if the $\mathsf{pOH} = 15$ ($[\mathrm{OH}]^{-} = 10^{-15}\mathrm{mol / l}$), $\mathsf{pH} = -1$

Any acid that yields a concentration of hydrogen ions with a molarity greater than 1 will be calculated to have a negative pH. For example, the pH of 12M HCl is calculated to be $-\log(12) = -1.08$.

**Answer:** the pH can be negative.