Zinc Hydroxide and Its Properties

The video tutorial explains how to write the formula for zinc hydroxide by examining the periodic table and understanding the charges of zinc and hydroxide ions. Zinc, a transition metal, consistently has a charge of two plus, while hydroxide is a polyatomic ion with a charge of one minus. The tutorial demonstrates how to balance these charges to achieve a net charge of zero, resulting in the correct formula for zinc hydroxide. The process includes adjusting subscripts and using parentheses for clarity.

What is the element symbol for zinc?

• ZnO

• Zc

• Zn

• Z

What is the charge of the hydroxide ion?

• 2-

• 1-

• 2+

• 1+

Why is zinc considered a special transition metal?

• It is not a metal.

• It has a variable charge.

• It forms covalent bonds.

• It always has a charge of 2+.

What is the charge of zinc in zinc hydroxide?

• 0

• 3+

• 2+

• 1+

How do you balance the charges in zinc hydroxide?

• By adding more zinc atoms.

• By changing the charge of hydroxide.

• By adjusting subscripts and using parentheses.

• By removing hydroxide ions.

Why do we use parentheses around hydroxide in the formula?

• To show it is a polyatomic ion.

• To indicate it is a metal.

• To make it look neat.

• To balance the charge.

What is the net charge of zinc hydroxide?

• 2+

• 1-

• 0

• 1+

What is the correct formula for zinc hydroxide?

• ZnOH

• Zn(OH)2

• Zn2OH

• ZnO2H