Question

Циклопентан объемом 7,47 мл сожгли в избытке кислорода.После конденсации паров воды смесь газообразных продуктов реакции пропустили через 12%-й раствор гидроксида натрия массой 200г.Вычислите массовые доли солей в растворе после реакции. (Плотность циклопентана 0,75 г/см^3,растворимостью кислорода в воде можно пренебречь.)

Answer 1

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Answer 2

Calculation of Mass Fractions of Salts in the Solution

To calculate the mass fractions of salts in the solution after the reaction, we need to consider the reaction between cyclopentane and excess oxygen, followed by the condensation of water vapor and the subsequent reaction with a 12% sodium hydroxide (NaOH) solution.

1. Reaction between Cyclopentane and Oxygen: - Cyclopentane (C5H10) is burned in excess oxygen (O2). - The balanced chemical equation for the combustion of cyclopentane is: ``` C5H10 + 8O2 -> 5CO2 + 5H2O ``` - According to the equation, for every mole of cyclopentane, 5 moles of carbon dioxide (CO2) and 5 moles of water (H2O) are produced.

2. Condensation of Water Vapor: - The water vapor produced in the combustion reaction condenses to form liquid water. - The condensed water is then reacted with a 12% sodium hydroxide (NaOH) solution.

3. Reaction with Sodium Hydroxide Solution: - The balanced chemical equation for the reaction between water and sodium hydroxide is: ``` H2O + NaOH -> NaOH2 + H2O ``` - According to the equation, for every mole of water, one mole of sodium hydroxide reacts to form sodium hydroxide dihydrate (NaOH2).

To calculate the mass fractions of salts in the solution after the reaction, we need additional information, such as the molar masses of the compounds involved and the amount of cyclopentane burned. Unfortunately, the provided question does not include this information. Therefore, it is not possible to calculate the mass fractions of salts in the solution without this missing information.

Please provide the molar mass of cyclopentane and the amount of cyclopentane burned in order to proceed with the calculation.