Which 0.10 M solutions will have the greatest electrical conductivity?

Electrical conductivity has do do with the mobility of electrons or ion, that is to say for electrical conductivity to occur there should be the movement of ions or electrons.

So, let us take option (A) and option (B) first, that is 0.50MHCl and 0.10MRbOH respectively. Both HCl and RbOH are good conductors of electricity that is to say they are both strong electrolytes. But, between the two, (that is HCl and RbOH) HCl will be better conductor of electricity that RbOH.

Option (D) is incorrect totally, and option (C) 0.50M K3PO4 is a strong electrolytes too and it will be will be the CORRECT ANSWER in this question because it gives 4 ions( K3PO4 <======> 3K^+ + PO4^-3) unlike HCl that only gives 2 ions(that is HCl <=====> H^+ + Cl^-).

throwdolbeau throwdolbeau · Answer 2 · 2025-03-28T18:37:19-04:00

Option C. 0.50M K₃PO₄.

Let's understand the concept behind electrical conductivity:

Electrical conductivity tells us how well a material will allow electricity to travel through it. It is proportional to the product of mobility and carrier concentration.

Let's look at options one by one:

In option (A) and (B) it is given 0.50M HCl and 0.10M RbOH respectively. Both HCl and RbOH are good conductors of electricity thus they both are strong electrolytes. Out of these two HCl is more stronger electrolyte than RbOH.

Option (D) 2.0M C₆H₁₂O₆ -the molecule of glucose is considered as a non-electrolyte, because of its inability to dissociate into ions.

Option (C) 0.50M K₃PO₄ is a strong electrolyte than HCl since K₃PO₄ is an ionic compound so it dissociates completely in water to form potassium ion and phosphate ion.

K₃PO₄ can dissociate into ions which can be represented as:

K₃PO₄(aq) → 3K⁺(aq) + PO₄³⁻(aq)

So out the following options K₃PO₄ will have the greatest electrical conductivity since it is the strongest electrolyte out of the given options.

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