Question

Если можно, с объяснением!!!17. В ряду гидроксидов H2Sio3 ⇒ H3po4 ⇒ H2so41) кислоты становятся слабее2) кислоты становятся сильнее3) усиливаются амфотерные свойства4) кислотные и основные свойства не изменяются 18. В ряду гидроксидов LiOH ⇒ NaOH ⇒ KOH1) основания становятся слабее2) основания становятся сильнее3) усиливаются амфотерные свойства4) основные свойства не изменяются

Answer 1

17.-2 В ряду сила кислот растет слева на право.
18.-2 По главным подгруппам сверху вниз сила оснований возрастает.

Answer 2

Explanation of Changes in Acidity and Basicity in the Given Hydroxide Series

When comparing the hydroxides H2SiO3, H3PO4, and H2SO4, and the hydroxides LiOH, NaOH, and KOH, it's important to understand how the acidity and basicity change within these series.

17. Changes in Acidity in the Hydroxide Series H2SiO3 ⇒ H3PO4 ⇒ H2SO4:

The trend in the given hydroxide series indicates a change in the acidity of the compounds. The acidity of the hydroxides increases as we move from H2SiO3 to H2SO4.

Answer: 2) Acids become stronger

The acidity of the hydroxides increases, making the acids stronger as we move from H2SiO3 to H2SO4. This is due to the increasing number of oxygen atoms bonded to the central atom, which leads to an increase in the acidic strength of the compound .

18. Changes in Basicity in the Hydroxide Series LiOH ⇒ NaOH ⇒ KOH:

Similarly, the trend in the given hydroxide series indicates a change in the basicity of the compounds. The basicity of the hydroxides increases as we move from LiOH to KOH.

Answer: 2) Bases become stronger

The basicity of the hydroxides increases, making the bases stronger as we move from LiOH to KOH. This is due to the increase in the size and polarizability of the hydroxide ion, which enhances the basic strength of the compound .