CH2CL-CH2-CH3->CH2=CH-CH3->CH3-CHOH-CH3->CH2=CH-CH3->CH3-CHBR-CH3 помогите решить цепочку!
1) CH2CL-CH2-CH3+ KOH (спирт, t) = CH2=CH-CH3+KCl+H2O
2) CH2=CH-CH3+H2O=CH3-CHOH-CH3
3) CH3-CHOH-CH3+H2SO4(t)= CH2=CH-CH3+H2O
4) CH2=CH-CH3+HBr=CH3-CHBR-CH3