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??????| ??????????%???????
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1??????%?owf????
????????????????????????????????????????????????500Kg??????1?10??????3Kg???????????????=???? / ??=?3 / 500??00%= 6%?
2??????g/l????
??????1L??????????????????????????????????????????????????? 10g/l???JFC 1 g/l???? 10g/l?
3????????
??????????????????????????????
???98%???????100g???????98g??????2g ???
?????????????98%???32%???30%???30%???30%????
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?1???5g????1:20??????1.0%???????5g/l?
???
? ??10g/l??????????
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??:??????????????????20*5=100 ml1???*????=??????*????????5*1.0%=10*V/1000?V=5 ml2????????????????=?????*????=5*100/1000=0.5g?3??????????????=?????-?????????=100-5=95ml?
4?????????????
?1????260kg,??1:10???A???1.30%???B?2.80%????15g/l?????????????????????????
?????=260*10=2600L
??A=1.3%*260/100=3.38kg
??B=2.8*260/100=7.28kg
???=15*2600/1000=39kg