Chemistry, asked by jananeespare, 1 year ago

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

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Answered by doubtss0
2

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Answered by Anonymous
51

{\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.}

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