Calcium Acetate and Ionic Compounds

The video tutorial explains how to write the chemical formula for calcium acetate. It begins by identifying the element symbol for calcium and the acetate ion, which is not found on the periodic table. The acetate ion is described as CH3COO- with a charge of 1-. The tutorial then discusses balancing the ionic charges between calcium, which has a 2+ charge, and the acetate ion to achieve a net charge of zero. The final formula for calcium acetate is presented, and alternative representations of the formula are discussed, including the placement of calcium at the end of the formula due to its role in reactions with acetic acid.

What is the element symbol for calcium?

• Ca

• Cl

• C

• Cu

Which of the following is a correct representation of the acetate ion?

• C2H4O2-

• CH3CO-

• C2H3O2-

• CH3COO-

What is the charge of the acetate ion?

• 1+

• 1-

• 2+

• 2-

Why is it necessary to balance the charges in an ionic compound?

• To ensure the compound is stable

• To make the compound soluble

• To make the compound reactive

• To give the compound a net charge of zero

What is the ionic charge of calcium?

• 1-

• 1+

• 2+

• 2-

How many acetate ions are needed to balance the charge of one calcium ion?

• Three

• Four

• Two

• One

In the formula for calcium acetate, why might calcium be placed at the end?

• To balance the equation

• To make the formula easier to read

• Due to its role in reactions with acetic acid

• Because it is more reactive

What is the final formula for calcium acetate?

• Ca(CH3COO)2

• CaC2H3O2

• Ca2(CH3COO)

• Ca(CH3CO)2

What happens to the hydrogen in acetic acid during the formation of calcium acetate?

• It is replaced by calcium

• It forms a new compound

• It remains unchanged

• It evaporates

Which of the following is NOT a reason for balancing charges in ionic compounds?

• To achieve a net charge of zero

• To ensure stability

• To make the compound more reactive

• To follow chemical rules