Why does solubility increase down group 1?

-In metal fluorides of group 1 and 2 , they have a common element fluorine, so the solubility depends on the size of the cation. On going down the group, the size of the cation increases and the salt becomes more ionic in nature. So, the solubility also increases down the group.

Why does solubility of group 1 carbonates increase down the group?

On moving down the group, their solubility further decreases because their lattice energy remains constant but hydration energy decreases and hydration energy becomes lower than lattice energy. “The solubility of carbonates and bicarbonates of alkali metals increases down the group.”

What are the trends in group 1?

Explaining the trend The reactivity of group 1 elements increases as you go down the group because: the atoms become larger. the outer electron becomes further from the nucleus. the force of attraction between the nucleus and the outer electron decreases.

What is the trend of solubility?

Group II metal hydroxides become more soluble in water as you go down the column. This trend can be explained by the decrease in the lattice energy of the hydroxide salt and by the increase in the coordination number of the metal ion as you go down the column.

What is trend of solubility in periodic table?

Solubility is linked to the cation element’s position in the periodic table. 1) The higher the period number, the less soluble the cation of an element within a family. Example: Ba2+ is less soluble (formed more ppt.) than Mg2+ Hg 2+ is less soluble (formed more ppt.)

How does solubility increase on the periodic table?

Water molecules are more attracted to a cation with a high charge density (i.e., a smaller atom) than one that is larger with a lower charge density. Therefore, as one moves down a family of elements in the periodic table, the charge density will decrease as will the solubility.

Why does thermal stability increase down Group 1?

That is why the Group 1 compounds are more thermally stable than those in Group 2. You have to heat the Group 1 compound more because the carbonate ions are less polarised by singly charged positive ions. In other words, as you go down the Group, the carbonates become more thermally stable.

Are Group 1 carbonates soluble?

Group 1: Alkali Metals and Carbonates (X2CO3) All except Lithium are soluble in water and stable to heat. Uses: drug development. Chemical Characteristics: Low solubility in water.

What is the trend in reactivity in Group 1?

The reactivity of Group 1 elements increases as you go down the group because: the atoms get larger as you go down the group. the outer electron gets further from the nucleus as you go down the group.

What are the trends in the structure and Behaviour of these elements in Group 1?

Group 1 elements are known as Alkali Metals. They are called s-block elements because their highest energy electrons appear in the s subshell. Progressing down group 1, the atomic radius increases due to the extra shell of electrons for each element. Going down the group, the first ionisation energy decreases.

Why does solubility increase down the group?

Down the group, the charge of the cation remains the same (i.e. +2) but the size of the metal ion increases. This could be claimed as the chief reason for the decrease in lattice energy and hence the increase in solubility. Down the group the basicity too increases.

What determines the trend in solubility?

The trend in the overall enthalpy, which is the difference between the lattice enthalpy and solvation enthalpy, should be what determines the trend in solubility. Since both are decreasing trends, the trend in the difference depends on which one decreases more quickly.

What is the trend in the melting point of Group 1 elements?

We can identify a trend in the melting points of group 1 elements: the melting point decreases as you go down the group from top to bottom. As the atomic radius increases down the group, the delocalised electrons making up the metallic bond get further from the nucleus so the metallic bond gets weaker and easier to weaken as you go down the group.

What is the solubility of carbonates in water down the group?

For group 1, ie., Alkali metals, solubility of carbonates in water increases down the group as the decrease in lattice energy is more than the decrease in hydration energy.. while for group 2, ie., Alkaline earth metals, solubility of carbonates in water decreases down the group as the decrease in hydration energy is more than…