The question asks for the value of x in the composition of Ferric alum given by the formula (NH\(_4\))\(_2\)SO\(_4\)·Fe\(_2\)(SO\(_4\))\(_3\)·xH\(_2\)O.
To understand the problem, we recognize that Ferric alum is a type of alum. Generally, alums are double sulfate salts, usually with the formula \(M_2SO_4 \cdot M_2'(SO_4)_3 \cdot 24H_2O\), where 24 is the number of water molecules of hydration, which is common among alums.
Let's analyze the given compound in the question: (NH\(_4\))\(_2\)SO\(_4\)·Fe\(_2\)(SO\(_4\))\(_3\)·xH\(_2\)O. The hydrate portion (xH\(_2\)O) is what determines the "x" value as it signifies the number of water molecules attached to the alum complex.
For typical alums, the number of water molecules of crystallization is usually 24. Ferric alum is no exception, conforming to this standard as it retains 24 water molecules in its crystalline structure.
Therefore, the correct value of x is 24.
To rule out other options:
Hence, the value of x in Ferric alum is 24.
Which of the following statements are true?
A. Unlike Ga that has a very high melting point, Cs has a very low melting point.
B. On Pauling scale, the electronegativity values of N and C are not the same.
C. $Ar, K^{+}, Cl^{–}, Ca^{2+} and S^{2–}$ are all isoelectronic species.
D. The correct order of the first ionization enthalpies of Na, Mg, Al, and Si is Si $>$ Al $>$ Mg $>$ Na.
E. The atomic radius of Cs is greater than that of Li and Rb.
Choose the correct answer from the options given below: