The $pH$ of blood is .....

The ionic product of water is equal to .......

Pure water is kept in a vessel and it remains exposed to atmospheric $CO_2$ which is absorbed,then its $pH$ will be

What will be the hydrogen ion concentration in moles $L^{-1}$ of a solution whose $pH$ is $4.58$?

$A$ solution has $[H^{+}] = 0.001 \ M$. What is the value of $[OH^{-}]$?

Calculate the hydrogen ion concentration in the following biological fluids whose $pH$ are given below:
$(a)$ Human muscle-fluid,$6.83$
$(b)$ Human stomach fluid,$1.2$
$(c)$ Human blood,$7.38$
$(d)$ Human saliva,$6.4$