若用清水一次漂洗，
根據(jù)溶質(zhì)質(zhì)量分數(shù)概念：溶質(zhì)質(zhì)量分數(shù)=

溶質(zhì)質(zhì)量

溶液質(zhì)量

×100%，洗滌劑質(zhì)量=

100×1%

100+4500

×100g=

1

46

g；
若將這些清水均分成質(zhì)量相等的三份后分三次漂洗，
根據(jù)溶質(zhì)質(zhì)量分數(shù)概念：溶質(zhì)質(zhì)量分數(shù)=

溶質(zhì)質(zhì)量

溶液質(zhì)量

×100%，
洗滌劑質(zhì)量=

100×1%

100+1500

×100g×

100

100+1500

×

100

100+1500

=

1

4096

g
通過比較兩次洗滌后溶質(zhì)質(zhì)量可知，將這些清水均分成質(zhì)量相等的三份后分三次漂洗效果好．