\(H_2+O_2\underrightarrow{^{^{t^0}}}2H_2O\)
\(0.2.......0.08\)
=> Hiệu suất tính theo O2
\(n_{O_2\left(pư\right)}=75\%\cdot0.08=0.06\left(mol\right)\)
\(\Rightarrow n_{O_2\left(dư\right)}=0.08-0.06=0.02\left(mol\right)\)
\(\Rightarrow n_{H_2\left(dư\right)}=0.2-0.06=0.14\left(mol\right)\)
\(\Rightarrow n_{H_2O}=0.06\cdot2=0.12\left(mol\right)\)
\(m_{O_2\left(dư\right)}=0.02\cdot32=0.64\left(g\right)\)
\(m_{H_2}=0.14\cdot2=0.28\left(g\right)\)
\(m_{H_2O}=0.12\cdot18=2.16\left(g\right)\)
GT:Oxi tác dụng hết trong phản ứng .
theo đề ta có:
\(nO_2=0,08.75=0,06mol\) ( đủ )
pthh:
\(2H_2+O_2\underrightarrow{t^o}2H_2O\)
0,12<-0,12->0,12
\(nH_2=0,2-0,12=0,08mol\) ( đủ)
\(nO_2=0,08-0,06=0,02mol\) ( đủ )
\(mH_2=2.0,08=0,16gam\)
\(mO_2=32.0,02=0,64gam\)
\(mH_2O=0,12.18=2,16gam\)