An alkaline medium has an aqueous salt solution, the formula of which is: a) AlCl3, b) KNO3, c) K2CO3, d) FeCl3.

| September 1, 2021 | education

Strong bases are those substances that dissociate well in water. They are called alkalis. As a comparison, we can note the fact that for poorly soluble bases there is such an indicator as the product of solubility. For such substances, it is very small and can reach a value of 10 ^ -31 and is a constant value. The more PR, the better the substance dissolves. And there is simply no PR for alkalis, because they are highly soluble.

The environment of the solution will be determined by the “stronger” part of the molecule.

For example KNO3. It is a salt of a strong base (KOH) and a strong acid (HNO3). Accordingly, the environment will be neutral.

AlCl3 and FeCl3 – salt of insoluble (medium) bases [Al (OH) 3 and Fe (OH) 3], but strong acids (HCl). Accordingly, the solution environment will be acidic.

K2CO3 is a salt of a strong base but a weak acid (H2CO3). Then the environment will be alkaline.



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