б) zn(no3)2+2naoh=zn(oh)2+2nano3
zn+2no3+2na+2oh=zn(oh)2+2na+2no3
Zn+2OH=Zn(OH)2
a)PbS+2HNO3=H2S+Pb(NO3)2
PbS+2H+2NO3=H2S+Pb+2No3
PbS+2H=H2S+Pb
б) zn(no3)2+2naoh=zn(oh)2+2nano3
zn+2no3+2na+2oh=zn(oh)2+2na+2no3
Zn+2OH=Zn(OH)2
a)PbS+2HNO3=H2S+Pb(NO3)2
PbS+2H+2NO3=H2S+Pb+2No3
PbS+2H=H2S+Pb