<span>б) Ca(2+) и NO3(-)
</span><span>в) Na(+) и SO4 (2-)</span>
С6H11CH3 (Cr2O3,t°C)=C6H5CH3+3H2 X=C6H5CH3(толуол)
5C6H5CH3+6KMnO4+9H2SO4 = 5C6H5COOH+6MnSO4+3K2SO4+14H2O
1. Cu + 4HNO₃ = Cu(NO₃)₂ + 2NO₂ + 2H₂O
2. Cu(NO₃)₂ + 2KOH = Cu(OH)₂ + 2KNO₃
3. Cu(OH)₂ = CuO + H₂O
4. 3CuO + 2NH₃ = 3Cu + N₂ + 3H₂O
1)K-KOH-KNO3-K2SO4-KCL-K
1.2K+2H2O-2KOH+H2
2.2KOH+Fe(NO3)2--2KNO3+Fe(OH)2
3.2KNo3+H2So4--K2So4+2HNo3
4.K2SO4+2HCl--2KCl+H2SO4
5.KCl--K+Cl