Question

Установите формулу кристалогидрата хлорида калция после прокаливания 14,6г которое масса твердого осадка составила 7,4

Answer 1

Ответ:

СaCl2*6H2O

Объяснение:

Через уравнение содержания компонента

7.4=14.6*(111/(111+X18))

7.4=1620,6/(111+18X)

821,4+133,2X=1620.6

133.2X=799,2

X=6

СaCl2*6H2O

Answer 2

Formula for Calcium Chloride Hydrate

To determine the formula for the calcium chloride hydrate after heating 14.6g, with a resulting mass of solid precipitate of 7.4g, we can use the concept of stoichiometry to find the molar ratio of water to calcium chloride.

First, we need to find the moles of calcium chloride and water using their respective molar masses. Then, we can determine the simplest whole number ratio between the moles of water and calcium chloride to establish the formula for the hydrate.

Calculation Steps

1. Calculate the moles of calcium chloride (CaCl2) and water (H2O) - The molar mass of CaCl2 is 110.98 g/mol. - The molar mass of H2O is 18.02 g/mol. - Moles of CaCl2 = mass of CaCl2 / molar mass of CaCl2 - Moles of H2O = (initial mass - mass of solid precipitate) / molar mass of H2O

2. Determine the ratio of moles of water to moles of calcium chloride - Divide the moles of water and calcium chloride by the smallest value obtained in step 1 to find the simplest whole number ratio.

3. Establish the formula for the hydrate - The formula for the hydrate will be determined based on the ratio obtained in step 2.

Conclusion

By following these steps, we can determine the formula for the calcium chloride hydrate after heating. Let's proceed with the calculations.