1. а) HOOC-COOH + 2C2H5OH = C2H5OOC-COOC2H5 + 2H2O
диэтилгидрооксалат
б) 2СH3-CH(CH3)-COOH + Ca(OH)2 = (CH3-CH(CH3)-COO)2Ca + 2H2O
2-метилпропионат кальция
2. СH2=CH-CH(CH3)-CH3 + HBr = CH3 - CH(Br)-CH(CH3)-CH3
CH3 - CH(Br)-CH(CH3)-CH3 + KOH = CH3-CH=C(CH3)-CH3 + KBr + H2O