m(NaOH)=100*0,04=4u;n(NaOH)=4:40=0,1моль;n(H2S)=2,24:22,4=0,1моль;m(H2S)=0,1*34=3,4г;
0,1 0,1 0,1
NaOH+H2S=NaHS+H2O
1 1 1
m(NaHS)=0,1*56=5,6;m(р-ра)=100+3,4=103,4;W(NaHS)=5,6:103,4=0,054(5,4%)
m(NaOH)=100*0,04=4u;n(NaOH)=4:40=0,1моль;n(H2S)=2,24:22,4=0,1моль;m(H2S)=0,1*34=3,4г;
0,1 0,1 0,1
NaOH+H2S=NaHS+H2O
1 1 1
m(NaHS)=0,1*56=5,6;m(р-ра)=100+3,4=103,4;W(NaHS)=5,6:103,4=0,054(5,4%)