Why Do Different Electrolytes Have Varying Molar Conductivities?

[physicist888]

strong and weak electrolytes-need help pleasez

hi all
i need help to solve the following exercise

Given: strong electrolyt limiting molar conductivity of ion i ( S.Cm2/mol)
HCl 426.1
CH3COONA 91.05
HF 405
NaCl 126.5
1- why did thos electrolyts has a different molar conductivity?
2- calculate the degree of dissociation alpha and the constant of dissociation K for a weak electrolyt CH3COOH dilute at 0.6. given the molar conductivity equal 195.3 Cm2/mol. (show the calculation in details)

 

[GreatMinds]

Why does everyone have questions like these? :(

 

[Yahaira.Reyes]

Are there any formulas? And are you calculating the equillibrium constant? Please re-write the question clearer with units. I will try to help you


I think the answer to the first question is because strong acids such as HCL and HF dissociate completely in water making them strong electrolytes. NaCl is a strong base so it also dissociates completely in water. Weak acids such as carboxylic acids dissociate partially in water giving them a weaker electrical current.