Sage-Tips

Why the conductance of H+ ion is abnormally high?

Answer: The ionic mobility and hence the conductance value of both H+ and OH− ion is very high. Earlier it was considered that high charge density of both the ion is responsible for this abnormal high conductance. But in aqueous solution the H+ ion basically exists as a hydroxonium ion H3O+.

Why does H+ have high mobility?

The ionic mobility of H+ ions are much higher than the other ions. These high values are the results of hydrogen bonding. In water, the proton is hydrated and its movement can be represented as HH HH 0 H …

What ions have high conductance?

Highest electrical conductivity in water is of Cs+ ion. This is due to extent of hydration, which is maximum in Li+.

How does the size of ions affect the conductance?

Hence, as the number of ions in any solution is large then its conductivity is also high. Small ions have small areas. Then there is less resistance as they move through the solution. Hence the smaller ions have greater conductivity than larger ions.

On what factors do the conductance of electrolytic solutions depend?

(1) Nature of electrolyte: The conductance of an electrolyte depends upon the number of ions present in the solution. Therefore, the greater the number of ions in the solution the greater is the conductance. The number of ions produced by an electrolyte depends upon its nature.

What factors determine the conductance of a solution?

There are three main factors that affect the conductivity of a solution: the concentrations of ions, the type of ions, and the temperature of the solution.

Why the mobility of proton in water is exceptionally high?

The Grotthuss mechanism involves an ongoing exchange of covalent and hydrogen bonds between O and H atoms, leading to a net displacement of the positive charge. Hence, in this mechanism, only the charge of the proton and not its mass is being transported, which explains its high mobility in water.

What does ionic mobility depends on?

ionic mobility will be in the order : Li+ < Na+ < K+ < Cs+ < Fr+ in water. Because smaller the size of cation greater will be its hydration and larger will be effective size and lower will be its ionic mobility in water.

Why does electrolytic conductance increases with increase in temperature?

-When we increase the temperature, the kinetic energy of the ions increases and they move faster i.e. they conduct their bearing charge faster and thus result in increased conductivity. So, with increase in temperature, the conductivity of electrolytic conductors increases.

Which of the following has the highest conductance?

The correct answer is Silver. Silver has the highest conductivity of all metals.

What factors affect conductance?

Testing Conductivity

• The concentration of dissolved ions.
• The types of ions in solution.
• Temperature.

On which factor conductance is depend?

(1) Nature of electrolyte: The conductance of an electrolyte depends upon the number of ions present in the solution. Therefore, the greater the number of ions in the solution the greater is the conductance.

Why does H+ have a high electrical conductivity?

The main reason for this is the fact that H+ has an exceptionally high conductivity. At least when compared to the ideally predicted values. This phenomenon can be explained with an understanding of the Grotthuss Mechanism.

Why is the H+ ion heavily hydrated?

The hydrogen ion, because of its small size and therefore, high charge density, is heavily hydrated. Experimental evidence suggest that H+ ion in aqueous solution is hydrated to form H9O4+ ion that’s a trihydrate H3O+.3H2O.

Why is H2O more conductive than Na+ K+ and AG+?

H+ ion is very roughly 5 times more conductive than ions like Na+, K+, and Ag+. This is because H2O is full of OH bonds and hydrogen bonds, and the H+ can hop from one water molecule to another, sort of.

Why is the conductivity of a proton high in a hydrophobic compound?

H+ has an exceptionally high conductivity. At least when compared to the ideally predicted values. This phenomenon can be explained with an understanding of the Grotthuss Mechanism. According to this explanation, the proton diffuses through the hydrogen bond network of the water molecules.