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A 0.050 M aqueous solution of which compound is the best conductor of electric current?

August 30, 2019

 

A 0.050 M aqueous solution of which compound is the best conductor of electric current?

(1) C3H7OH

(2) C6H12O6 

(3) MgSO4

(4) K2SO4

 

Answer and Explanation:

First we need to go over what kind of compounds are the best conductors of electricity, or electrolytes.

These are: metals, ionic compounds that are molten, ionic compounds that are dissolved in water, strong acids and strong bases.  Let's now go over the compounds listed in answer choices: C3H7OH is a covalent compound (all the elements are nonmetals) and does not conduct electricity, C6H12O6 similarly is a covalent compound because it consists of all nonmetals. Going further, both MgSO4 and K2SO4 are ionic compounds. They consist of a metal Mg (magnesium) and a polyatomic ion (sulfate) as well as potassium metal and sulfate ion. Both of these compounds can conduct electricity.  However, MgSO4 breaks into 2 ions, Mg^2+ and SO4^ 2-. K2SO4, on the other hand, breaks into three ions, 2K+ and one SO4^ 2- ion. Since, choice 4, breaks into most ions it will be a better conductor of electricity than MgSO4. Therefore, choice 4 is the correct answer choice.

 

Transformation Tutoring specializes in chemistry tutoring on all levels, both high school and college. We tutor high school chemistry, organic chemistry, biochemistry, AP Chemistry, Regent Chemistry and SATII Chemistry. Our founder, Mayya Glushankova, is an Honors NYU graduate in chemistry and psychology and a veteran chemistry tutor. 

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