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                   observation and calculations. class 11 th chemistry project. plz help me 

GUAVA SOLUTION BURETTE READING VOLUME OF THE KMnO4 used in ml
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4 years ago

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4 years ago

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how many grams of KCl would have to be diisolved in 60 gms H2O to give 20% by weight of solution?
 
 
total mass of the water=60g let weight of KCl required=xg so weight %=20% i.e. {x/(x+60)}=20%=20/100 x=0.2*x +....60*0.2 0.8*x=12 x=12/0.8=15g...
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let amount=xg so x/(x+60)=20%=0.2 x=15g..... so the amount of KCL needed=15g .................................. .........................................
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