С6H4(CH3)OH + KOH = С6H4(CH3)OK+ H2O
1) m(KOH)=m(раствора KOH)*w(KOH)=300*0.015=4.5
2) n(KOH)=m(KOH)/M(KOH)=4.5/56=0.08
3) n(KOH)=n(С6H4(CH3)OH)=n(С6H4(CH3)OK)=0.08
4) w(С6H4(CH3)OK)=M(С6H4(CH3)OK)*n(С6H4(CH3)OK)/(m(раствора)+m(С6H4(CH3)OK))
w(С6H4(CH3)OK)= 146*0.08/(300+108*0.08)=11.68/308.64=0.03784 или 3,784%