<span>1,16 * 10-4 моль/л....</span>
CH3-CH3 →Cr2O3(450C)→ CH2=CH2 + H2
<span>H3AsO4 + 3KOH → K3AsO4 + 3H2O
</span>3H+ +3OH-=3H2O
Ba(OH)2 + H2SO4(разб.) = BaSO4↓ + 2H2O
Ba2+ + 2OH− + 2H+ + SO42− = BaSO4 + 2H2O
<span>
2HNO3+Ba(OH)2=Ba(NO3)2+2H2O<span>
2H+ +2OH- =2H2O
</span></span>2HNO3(разб.) + Cu(OH)2 = Cu(NO3)2 + 2H2O
<span>2H++ Cu(OH)₂ = Cu2+ + 2H₂O</span>
2Al+6HCl = 2AlCl3 + 3H2
0.5 моль ---- х
2 моль ------ 67,2л
х=16,8л