The ph of an aqueous solution of Al3 is?

Question

The ph of an aqueous solution of Al3  is?

Answer

pH of an Aqueous Solution of Al3+

Aluminum ion (Al3+) is a cation with a positive charge of three. When Al3+ dissolves in water, it reacts with water to form hydroxide ions (OH-) and hydrated aluminum ions. The pH of the solution depends on the concentration of OH- and H+ ions produced in the reaction.

Reaction of Al3+ with Water

The reaction of Al3+ with water can be represented as follows:

Al3+ + 3H2O → Al(OH)3 + 3H+

In this reaction, Al3+ reacts with three water molecules to form hydrated aluminum ions (Al(OH)3) and three hydrogen ions (H+). The hydrogen ions make the solution acidic, while the hydroxide ions make the solution basic.

pH Calculation

The pH of the solution can be calculated using the following equation:

pH = -log[H+]

Where [H+] is the concentration of hydrogen ions in the solution. Since the reaction between Al3+ and water produces three hydrogen ions, the concentration of hydrogen ions can be calculated by multiplying the concentration of Al3+ by three.

Example: If the concentration of Al3+ in a solution is 0.1 M, the concentration of hydrogen ions is:

[H+] = 3 x 0.1 = 0.3 M

The pH of the solution can then be calculated by taking the negative logarithm of the hydrogen ion concentration:

pH = -log(0.3) = 0.52

Conclusion

The pH of an aqueous solution of Al3+ depends on the concentration of hydrogen ions produced in the reaction between Al3+ and water. Since the reaction produces three hydrogen ions, the concentration of hydrogen ions can be calculated by multiplying the concentration of Al3+ by three. The pH of the solution can then be calculated using the equation pH = -log[H+].

Answer

Ans :- slightly basic , because the hydrolysis of Al3+ salt given Al(OH)3 which is a weak base and hence ,pH is slightly basic.

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