(1) CO + NaOH = HCOONa.(2) HCOONa + HCl = HCOOH + NaCl.(3) H₂C(OH)-CH(OH)-CH₂-OH + 3HCOOH = H₂C(O-CHO)-CH(O-CHO)-CH₂-O-CHO + 3H₂O.(4) H₂C(O-CHO)-CH(O-CHO)-CH₂-O-CHO + 3KOH = H₂C(OH)-CH(OH)-CH₂-OH + 3HCOOK.
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(1) CO + NaOH = HCOONa.
(2) HCOONa + HCl = HCOOH + NaCl.
(3) H₂C(OH)-CH(OH)-CH₂-OH + 3HCOOH = H₂C(O-CHO)-CH(O-CHO)-CH₂-O-CHO + 3H₂O.
(4) H₂C(O-CHO)-CH(O-CHO)-CH₂-O-CHO + 3KOH = H₂C(OH)-CH(OH)-CH₂-OH + 3HCOOK.