
Вычислите объём хлора (н.у),который потребуется для вытеснения всего иода из 300 г 15%-го раствора
иода калия.Вычислите кол-во вещества новой соли,которое при этом образуется.

Ответы на вопрос




Calculating the Volume of Chlorine Needed
To calculate the volume of chlorine needed to displace all the iodine from the 300g 15% potassium iodide solution, we can use the following chemical equation:
2KI + Cl2 → 2KCl + I2
From the equation, we can see that 1 mole of chlorine displaces 1 mole of iodine.
First, we need to calculate the moles of iodine in the 300g 15% potassium iodide solution.
Step 1: Calculate the moles of iodine in the solution The molar mass of KI (potassium iodide) is 166 g/mol. Using this information, we can calculate the moles of iodine in the solution.
Moles of KI = (mass of KI) / (molar mass of KI) Moles of I2 = 0.15 * Moles of KI (from the 15% solution)
Now, we can calculate the moles of iodine in the solution.
Step 2: Calculate the volume of chlorine needed Since 1 mole of chlorine displaces 1 mole of iodine, the moles of iodine in the solution will be equal to the moles of chlorine needed.
Volume of chlorine = Moles of I2 * 22.4 L/mol (at standard temperature and pressure)
Let's calculate the moles of iodine and then the volume of chlorine needed.
Calculations
Molar mass of KI (potassium iodide) = 166 g/mol Moles of KI = 300g / 166 g/mol = 1.807 moles Moles of I2 = 0.15 * 1.807 = 0.271 molesVolume of chlorine = 0.271 moles * 22.4 L/mol = 6.08 L
Therefore, the volume of chlorine needed to displace all the iodine from the 300g 15% potassium iodide solution is 6.08 liters.
Amount of New Salt Formed
According to the chemical equation, 2 moles of KI react with 1 mole of Cl2 to form 2 moles of KCl and 1 mole of I2.
So, for every mole of chlorine used, 2 moles of KCl are formed.
The moles of KCl formed will be equal to the moles of chlorine used.
Moles of KCl formed = Moles of Cl2 = 0.271 moles
Therefore, the amount of new salt formed is 0.271 moles.


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