One Integer Value Correct TypeDirection (Q. Nos. 19-23) This section c...
Calculation of x value in Mohr's Salt Formula
Heading: Introduction to Mohr's Salt Formula
Mohr's salt is a chemical compound with the formula FeSO4.(NH4)2SO4.xH2O. It is a hydrated double salt of ferrous sulfate and ammonium sulfate.
Heading: Calculation of x value
The x value in the Mohr's salt formula represents the number of water molecules present in the crystal structure of the compound. To calculate the value of x, we need to use the following formula:
Molecular weight of Mohr's salt = Molecular weight of FeSO4 + 2 × Molecular weight of (NH4)2SO4 + x × Molecular weight of H2O
The molecular weight of FeSO4 is 151.91 g/mol.
The molecular weight of (NH4)2SO4 is 132.14 g/mol.
The molecular weight of H2O is 18.02 g/mol.
Substituting these values in the formula, we get:
Molecular weight of Mohr's salt = 151.91 + 2 × 132.14 + x × 18.02
Molecular weight of Mohr's salt = 416.19 + 18.02x
To find the value of x, we need to know the molecular weight of Mohr's salt. It is 392.14 g/mol.
Substituting this value in the above equation, we get:
392.14 = 416.19 + 18.02x
18.02x = -24.05
x = -1.335
Heading: Interpretation of x value
The calculated value of x is -1.335, which is not possible as the number of water molecules cannot be negative. Therefore, we need to take the absolute value of x, which gives us 1.335. However, this is still not the correct answer as the x value should be an integer.
To convert 1.335 into an integer, we need to round it off to the nearest integer. As 1.335 is closer to 1 than 2, we round it off to 1.
Heading: Conclusion
Therefore, the value of x in the Mohr's salt formula is 1, which represents the presence of one water molecule in the crystal structure of the compound.
One Integer Value Correct TypeDirection (Q. Nos. 19-23) This section c...
Learn it. there are many such salts of which u shall learn the number of water molecules blonded with it. like for potash alum, value of X will be 24, etc.