(1) 1.0 mol /(L? Min)(2 points)? (2)(2 points)
(3) Really? (2 points)
(4)& lt； ( 1)? Rapid reaction rate at T 2 (2 points) > (1)
(5) Unreasonable (1)? SiCl 4 is completely hydrolyzed in water to generate silicic acid and hydrochloric acid (2 points).
(6) White precipitate is transformed into black precipitate (1)
(1)T 1, the amount of SiCl 4 consumed within 2 minutes after the start of the reaction is 0.5mol, so the amount of HCl generated is 2.0mol. Therefore, the reaction rate expressed by HCl is 1.0 mol/(L? Minutes).
(2) Equilibrium constant refers to the ratio of the product of the power of product concentration to the product of the power of reactant concentration when the reversible reaction reaches equilibrium under certain conditions. According to the equation, the expression of the equilibrium constant of the reaction can be written. It should be noted that no solid or pure liquid can appear in the expression.
(3) Because this is a reversible reaction with increased volume, the volume of the container is doubled, and the equilibrium moves to the positive reaction direction, thus improving the conversion rate of reactants. E is correct. When more SiCl _ 4 (G) is added, the equilibrium will move to the positive reaction direction, but it will reduce its own conversion rate and increase the conversion rate of hydrogen, so A is incorrect and B is correct. Si(s) is a solid, which does not affect the balance, and C is incorrect. The catalyst can change the positive and negative reaction rates to some extent, but it will not affect the equilibrium, but this is not correct. So the correct answer is be.
(4) According to the data in the table, the reaction rate is fast when the temperature is T 2 at the same time, because the higher the temperature, the faster the rate, so T 2 is greater than T 1. N 1 >N 2 shows that the conversion rate of the former is lower than that of the latter, that is, the higher the temperature, the greater the conversion rate of reactants, so the positive reaction is endothermic. That is, Δ h is greater than 0.
(5) Because SiCl _ 4 is completely hydrolyzed with water to generate silicic acid and hydrochloric acid, it is wrong to absorb the generated HCl by water immersion.
(6) dissolving the balanced mixed gas in water, and the obtained solution contains hydrochloric acid. AgCl precipitation will occur when AgNO 3 solution is added dropwise. After filtration, Na 2 S solution will be added to the precipitate, and the color of the precipitate will change from white to black, because Ag 2 S is more insoluble than AgCl, and the precipitate will be transformed into a more insoluble substance.