$K_b$ for $NH_4OH$ is $1.8\times 10^{-5}.$ The $[\mathop O\limits^\Theta  H]$ of $0.1\,M\,NH_4OH$ is

  • A

    $5.0\times 10^{-2}$

  • B

    $4.20\times 10^{-3}$

  • C

    $1.34\times 10^{-3}$

  • D

    $1.8\times 10^{-6}$

Similar Questions

A monoprotic acid in a $0.1\,\,M$ solution ionizes to $0.001\%$. Its ionisation constant is

A solution of sodium borate has a $pH$ of approximately

Derive the equation of relation between weak base ionization constant ${K_b}$ and its conjugate acid ionization constant ${K_a}$

A weak base $MOH$ of $0.1\, N$ concentration shows a $pH$ value of $9$. What is the  percentage degree of ionisation of the base ? ......$\%$

Equal volumes of three acid solutions of $pH \,3, 4$ and $5$ are mixed in a vessel.  .........$  \times  10^{-4} \,M$ will be the $H^+$ ion concentration in the mixture ?

  • [AIPMT 2008]