Question 958833
Let {{{ x }}} = ml pf water to be added
{{{ .2*50 = 10 }}} ml of HCL in 20% solution
---------------------
{{{ 10 / ( x + 50 ) = .1 }}}
{{{ 10 = .1*( x + 50 ) }}}
{{{ 10 = .1x + 5 }}}
{{{ .1x = 5 }}}
{{{ x = 50 }}}
50 ml of water needs to be added
check:
{{{ 10 / ( x + 50 ) = .1 }}}
{{{ 10 / ( 50 + 50 ) = .1 }}}
{{{ 10/100 = .1 }}}
{{{ .1 = .1 }}}
OK