Question

Объясните пожалуйста!!! Для увеличения скорости реакции: 2h2o2--->2h2o+o2 необходимо 1)добавить катализатор 2)увеличить давление 3)уменьшить температуру 4)уменьшить концентрацию кислоты Ответ: 1 Объясните почему 2 не подходит

Answer 1

В соответствии с принципом Ле Шателье-Брауна при повышении давления увеличивается скорость той реакции, которая приводит к уменьшению объемов.
В данной реакции слева 2 объема, а справа - 2 + 1 = 3 объема. Значит, повышение давления приведет к обратному процессу - смещению равновесия влево. Потому 2) не подходит.

Answer 2

Increasing Reaction Speed in the Decomposition of Hydrogen Peroxide

To increase the speed of the reaction \(2H_2O_2 \rightarrow 2H_2O + O_2\), it is necessary to consider the factors that affect reaction rates.

1) Adding a Catalyst - Adding a catalyst is the correct option to increase the reaction speed. A catalyst is a substance that increases the rate of a chemical reaction without being consumed in the process. It provides an alternative reaction pathway with lower activation energy, allowing the reaction to occur more rapidly [[1]].

Why Other Options Are Not Suitable 2) Increasing Pressure - Increasing the pressure is not suitable for increasing the speed of the given reaction. The decomposition of hydrogen peroxide is not significantly affected by changes in pressure, as it is a decomposition reaction that does not involve gaseous reactants or products. Therefore, altering the pressure would not have a significant impact on the reaction rate [[2]].

3) Decreasing Temperature - Decreasing the temperature would actually decrease the reaction rate. In general, lower temperatures result in slower reaction rates, as the reactant molecules have less kinetic energy and move more slowly, leading to fewer successful collisions and a lower reaction rate [[3]].

4) Decreasing Acid Concentration - The concentration of acid is not directly related to the speed of the given reaction. The decomposition of hydrogen peroxide is catalyzed by various substances, but the concentration of acid is not a primary factor affecting the reaction rate [[4]].

In conclusion, adding a catalyst is the most effective method for increasing the speed of the given reaction, while the other options mentioned are not suitable for this purpose.

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