Complete the table by filling in the formula for the ionic compound formed by each pair of cations and anions, as shown for the first pair. Ion K + NH 4 + Mg 2+ Fe 3+ Cl - KCl OH - CO 3 2- PO 4 3- Complete the first row of the table. Complete the second row of the table. Complete the third row of the table. Complete the fourth row of the table.

Hi everyone today. We have a question asking us to identify the chemical formula of the compound form from the following sets of elements. By using louis symbols. So our goal here is to have an overall charge of zero. First we're going to look at calcium and selenium calcium is group A. So it has a charge of plus two and selenium is group six A. So as a charge of negative two, these are going to cancel out and give us one calcium and one selenium also known as calcium cell. Inside. Next we have barium and fluoride. Barium is in group two a. So it has a charge of plus two Fluoride is in group seven a. So it has a charge of -1. And we are going to crisscross these and that gives us one barium and 4 eyed also known as barium fluoride. Next we have sodium and oxygen, sodium is in group one a. So it has a charge of plus one And oxygen is in group six a. So it has a charge of -2. We are going to criss cross these and that gives us to sodium and one oxygen also known as sodium oxide. Lastly we have aluminum and sulfur. So aluminum is in group three A. Giving it a charge of plus three, sulfur is in group six A. Giving it a charge of negative two. We are going to criss cross these Giving us two aluminum And three sulfide also known as aluminum sulfide. And these are our answers. Thank you for watching. Bye

Ch.2 - Atoms, Molecules, and Ions

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Brown 15th Edition

Ch.2 - Atoms, Molecules, and Ions

Problem 63

Chapter 2, Problem 63

Complete the table by filling in the formula for the ionic compound formed by each pair of cations and anions, as shown for the first pair. Ion K⁺ NH₄⁺ Mg²⁺ Fe³⁺ Cl^- KCl OH^- CO₃^2- PO₄^3-
Complete the first row of the table.
Complete the second row of the table.
Complete the third row of the table.
Complete the fourth row of the table.

Verified step by step guidance

Identify the cation and anion in the fourth row: Fe^{3+} and PO_4^{3-}.

Determine the charges of the cation and anion: Fe^{3+} has a charge of +3 and PO_4^{3-} has a charge of -3.

To form a neutral ionic compound, the total positive charge must balance the total negative charge.

Since the charges are already balanced (3+ and 3-), one Fe^{3+} ion will pair with one PO_4^{3-} ion.

Write the formula for the ionic compound by placing the cation first followed by the anion: FePO_4.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Ionic Compounds

Ionic compounds are formed through the electrostatic attraction between cations (positively charged ions) and anions (negatively charged ions). The overall charge of the compound must be neutral, meaning the total positive charge from the cations must balance the total negative charge from the anions. This principle is essential for determining the correct formula of the compound.

Charge Balance

To write the formula for an ionic compound, it is crucial to ensure that the charges of the cations and anions balance each other. For example, if a cation has a charge of +2, it will require two anions with a charge of -1 to achieve neutrality. This concept helps in determining the subscripts in the chemical formula.

Common Ions and Their Charges

Familiarity with common cations and anions, along with their respective charges, is vital for constructing ionic formulas. For instance, K+ (potassium) has a +1 charge, while Cl- (chloride) has a -1 charge. Knowing these charges allows for the correct pairing of ions to form stable ionic compounds.