Question

Answer true or false:
a. The properties that make water a good solvent are it's polarity and its capacity for hydrogen bonding.
b. when ionic compounds dissolve in water, their ions become solvated by water molecules.
c. The term " water of hydration " refers to the number of water molecules that surround an ion in aqueous solution.
d. The term " anhydrous " means " without water ".
e. An electrolytes is a substance that dissolves in water to give a solution that conducts electricity.
f. In a solution that conducts electricity, cations migrate towards the cathode and anions migrate towards the anode .
G. Ions must be present in a solution for the solution to conduct electricity.
h. distilled water is a nonelectrolyte.
I. a strong electrolyte is a substance that dissociates completely into ions in aqueous solution.
j. all compounds that dissolve in water are electrolytes.

Answer 1

a. True. Due to highly polar nature of water, most polar compounds and almost all ionic compounds are soluble in water.

b. True. Cations and anions of the ionic compound are surounded by many layers of water molecules, which are oriented according to the charge on the ion.

c. False. Water of hydration are the molecules of water inside the crystal of the compound.

d. True.

e. True. That's why the name "electrolyte".

f. True. Cathode is negative so the positive ions (cations) move towards it and anode is positive so negative ions (anions) move towards it.

g. True. Without ions, there is no charge flow hence no electricity flow.

h. True. Distilled water doesn't have any ions. So, no flow of electricity.

i. True. That's why you have more ions and hence better flow of electricity.

j. False. Many polar compounds like glucose, alcohols, amines etc are soluble in water. But they don't dissociate into ions. So, their aqueous solutions aren't conducting. So, they are not electrolytes.

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