Question

What is the molarity of NaOH solution if 250 mL of it contains 1mg of NaOH?

Answer 1

Explanation:

hope this is your solution

Answer 2

${\mathfrak{\pink{\underline{\underline{Answer:-}}}}}$

$\sf{Molarity=10^{-4}M}$

${\mathfrak{\pink{\underline{\underline{Explanation:-}}}}}$

$\sf{Molarity=\dfrac{No.\;of\;moles}{Volume\;(in\;liter)}}$

$\sf{Volume = 250 ml = 25\times 10^{-2}liter}$

$\sf{Given\;mass(W)\;NaOH=1\;mg=10^{-3}g.}$

$\sf{Molar\;mass(M)=40g.}$

$\sf{Moles=\dfrac{Given\;mass}{Molar\;mass}}$

$\sf{=\dfrac{10^{-3}}{40}=25\times 10^{-6}}$

$\sf{Molarity=\dfrac{No.\;of\;moles}{Volume(in\;liter)}}$

$\sf{Molarity=\dfrac{25\times 10^{-6}}{25\times 10^{-2}}}$

$\sf{Molarity=10^{-4}M.}$