On what factors hydration enthalpy depends?

The magnitude of hydration enthalpy depends on the charge density of the ions. The charge density is more for smaller ions and hence the smaller ions have higher values of hydration enthalpy. The higher the charge density the higher will be the force of attraction between the ion and the water polar end.

Which will have more hydration enthalpy?

The lithium-ion has by far the highest hydration enthalpy in Group 1 and the small fluoride ion has by far the highest hydration enthalpy in Group 7.

Is hydration enthalpy directly proportional to size?

The hydration energy is inversely proportional to the size of the ion which means that ions that are smaller in size have higher hydration energies.

What affects heat of hydration?

The heat of hydration is the heat generated when water and portland cement react. Heat of hydration is most influenced by the proportion of C3S and C3A in the cement, but is also influenced by water-cement ratio, fineness and curing temperature. As each one of these factors is increased, heat of hydration increases.

Which has minimum hydration enthalpy?

Lithium ion
“Lithium ion has the smallest hydration enthalpy of all the alkali metals.” Answer.

Which ion has highest hydration energy?

Hydration energy is large for the ion having smaller size and higher charge. Here Mg2+ ion is the smallest and has +2 charge, hence its hydration will be the highest.

How does hydration energy depends on size?

The size of the hydration enthalpy is governed by the amount of attraction between the ions and the water molecules. The attractions are stronger the smaller the ion. In both groups, hydration enthalpy falls as the ions get bigger. The attractions are stronger the more highly charged the ion.

Why does hydration enthalpy decreases with increase in ionic size?

Which ion has the lowest hydration enthalpy?