m1(koh)=0.1×300г=30г
m2(koh)=30+20=50г
m2(р-ра)=300+20=320г
w(koh)=50/320=0.15625×100%=15.625%
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m1(koh)=0.1×300г=30г
m2(koh)=30+20=50г
m2(р-ра)=300+20=320г
w(koh)=50/320=0.15625×100%=15.625%