Question

concentrated aqueous sulphuric acid is 98% H2 S o4 by mass and has a density of 1.80 gram per ml volume of acid required to make 1 litre of 0.1 molar H2 s o4

Answer 1

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

$\rm{Volume\;of\;acid\;required=5.5\;ml.}$

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

$\rm{98\%\;by\;weight\;means\;98\;g\;H_{2}SO_{4}\;in\;100\;g\;solution\;or\;98\;g\;H_{2}SO_{4}\;in\;2\;g\;water.}$

$\rm{Number\;of\;moles\;of\;H_{2}SO_{4}=\dfrac{98}{98}=1}$

$\rm{Density=1.8\;g/L}$

$\rm{Volume\;of\;solution=Mass\;of\;solution/Density}$

$\rm{=100/1.8}$

$\rm{=55.55\;ml}$

$\rm{=0.055\;L}$

$\rm{Molarity\;of\;solution=\dfrac{Moles\;of\;H_{2}SO_{4}}{Volume\;of\;solution\;in\;litre}}$

$\rm{=\dfrac{1}{0.055}}$

$\rm{=18.18\;M}$

$\rm{Applying,}$

$\rm{M_{1}V_{1}=M_{2}V_{2}}$

$\rm{18.18\times V_{1}=0.1\times 1}$

$\rm{V_{1}=0.0055\;L=5.5\;ml}$

$\large{\boxed{\boxed{\rm{\blue{Hence,\;volume\;of\;acid\;required=5.5\;ml}}}}}$