(16) Smog weather seriously affects people's quality of life, among which nitrogen oxides and sulfur oxides are one of the main reasons for smog weather. Eliminate nitrogen

(1)① No, No 2? (2 points)? ② Mn (2 points)? 200-250℃ or any temperature within this range (2 points)

③ 1: 1 (2 points) 2n3 (g)+no (g)+no2 (g) 2n2 (g)+3H2O (g) δ h =-2qkj/mol (3 points).

②④K =？ (2 points)

⑤c(SO 3 2 - )=？ Mol/L = 2× 10-7 mol/L (3 points)

Analysis of test questions: (1)① According to the change of valence of elements before and after the reaction, the valence of nitrogen in ammonia increased from -3 to 0, and the lost electrons were oxidized into reducing agents; In nitrogen oxidation, the valence of nitrogen decreases, and the obtained electrons are reduced to oxidants, so the oxidants are NO and NO 2.

(2) As can be seen from the figure, the denitrification rates of the two catalysts are almost the same, but the curve temperature where Mn is located is low, so it can be seen from the figure that the optimal catalyst and the corresponding temperature are Mn and 200 ~ 250℃ or any temperature within this range.

③ According to the image, C (NO 2)/C (NO) = 1: 1 is the highest nitrogen removal rate. Since the heat released per generation of 1molN 2 reaction is QkJ, the corresponding thermochemical equation of denitration reaction at this time is 2nh3 (g)+NO (g)+NO2 (g) 2n2 (g).

(2) (4) The chemical equilibrium constant is the ratio of the product of the power of product concentration and the power of reactant concentration when the reversible reaction reaches the equilibrium state under certain conditions, so according to the chemical equation, the expression of the equilibrium constant of the reaction is k =.

⑤ According to the expression of solubility product constant of calcium sulfate KSP (caso3) = C (Ca2+) C (SO32-), C (SO32-) = mol/L = 2×10-7mol/L.