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Chapter 4: Q4.6P (page 178)

Question: Which of the following scenes best represents a volume from a solution of magnesium nitrate?

Short Answer

Expert verified

Answer

Scene (B) best represents a volume from a solution of magnesium nitrate.

Step by step solution

01

Dissociation of ionic compounds in aqueous solution  

When an ionic compounds dissolve in the aqueous medium, it dissociates into its ions, since, they form an ionic bond. When it breaks, ions contain some positive or negative charge that depends upon the valency of that atom.

02

Dissociation of magnesium nitrate 

In an aqueous medium,Mg(NO3)2 is dissociated as Mg2+and NO3-ions which means it produces one ion of Mg2+and two ions of data-custom-editor="chemistry" NO3-in the solution, therefore, the number of anions is twice the number of a cation.

role="math" localid="1663317404187" Mg(NO3)2(s)鈫�Mg2+(aq)+2NO3-(aq)

In scene (B) there are two ions and four anions Hence, scene (B) best represents a volume from a solution of magnesium nitrate.

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