(1)3 C + 2 K 2Cr 2O 7+ 8 H 2SO 4→ 3 CO 2+ 2 K 2SO 4+ 2 Cr 2(SO 4) 3+
8 H 2O
(2)K 2Cr 2O 7CO 2(3) A(4)0.4mol
略