Question

определите у кого сильнее выражены кислотные свойства:H2SIO3 или H3PO4.Объясните свой выбор,Решите пожалуйстааа

Answer 1

H2SIO3 - метакремниевая кислота(очень  слабая к-та)

H3PO4 - ортофосфорная кислота (трехосновная кислота средней силы )

объяснение : неметаллические свойства фосфора выражены сильнее, чем кремния

Answer 2

Determining the Strength of Acidic Properties: H2SiO3 vs H3PO4

To determine which compound, H2SiO3 or H3PO4, has stronger acidic properties, we need to compare their acid dissociation constants (Ka values). The Ka value represents the extent to which an acid dissociates in water and indicates the strength of the acid.

According to the search results, the acid dissociation constants for H2SiO3 and H3PO4 are as follows:

- H2SiO3: Ka = 1.5 x 10^-9 [[1]] - H3PO4: Ka = 7.5 x 10^-3 [[2]]

Comparing these values, we can see that the Ka value for H3PO4 is significantly higher than that of H2SiO3. This indicates that H3PO4 is a stronger acid compared to H2SiO3.

The higher Ka value of H3PO4 suggests that it dissociates more readily in water, releasing more H+ ions. This is an indication of stronger acidic properties. On the other hand, the lower Ka value of H2SiO3 suggests that it has weaker acidic properties.

Therefore, based on the acid dissociation constants, H3PO4 has stronger acidic properties compared to H2SiO3.

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