Question 740906
Let {{{ a }}} = ml of 17% solution needed
Let {{{ b }}} = ml of alcohol needed
{{{ .17a }}} = ml of salicylic acid in 17% solution
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(1) {{{ a + b = 473 }}}
(2) {{{ .17a / 473 = .02 }}}
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(2) {{{ .17a = .02*473 }}}
(2) {{{ .17a = 9.46 }}}
(2) {{{ a = 55.647 }}}
and, since
(1) {{{ a + b = 473 }}}
(1) {{{ b = 473 - 55.647 }}}
(1) {{{ b = 417.353 }}}
55.647 ml of 17% solution is needed
417.353 ml of alcohol is needed
check:
(2) {{{ .17a / 473 = .02 }}}
(2) {{{ .17*55.647 / 473 = .02 }}}
(2) {{{ 9.46 / 473 = .02 }}}
(2) {{{ 9.46 = .02*473 }}}
(2) {{{ 9.46 = 9.46 }}}
OK