The video tutorial explains how to write the formula for bromis acid. It begins by identifying that acids start with hydrogen. The absence of a prefix in 'bromis acid' indicates the presence of more than two elements, involving a polyatomic ion. The tutorial guides through deriving the ion name by replacing 'ous' with 'ite', resulting in the bromide ion (BrO2) with a charge of one minus. Finally, it balances the charges with hydrogen to confirm the formula as HBrO2.

What is the first element to consider when writing the formula for an acid?

• Oxygen

• Hydrogen

• Nitrogen

• Carbon

What does the absence of a prefix in 'bromis acid' indicate?

• It contains two elements.

• It contains only one element.

• It contains four elements.

• It contains three elements.

What suffix is used to determine the polyatomic ion from the stem 'brome'?

• -ous

• -ate

• -ide

• -ite

What is the formula for the bromide ion?

• BrO

• BrO4

• BrO2

• BrO3

What is the ionic charge of the bromide ion?

• 2+

• 1+

• 2-

• 1-

What is the initial formula for bromis acid before balancing charges?

• HBrO

• HBr

• HBrO2

• HBrO3

What is the charge of hydrogen in the periodic table?

• 1-

• 0

• 2+

• 1+

How do the charges of hydrogen and bromide ion balance in bromis acid?

• Hydrogen is 1- and bromide is 1+, so they balance.

• Hydrogen is 0 and bromide is 1-, so they balance.

• Hydrogen is 2+ and bromide is 1-, so they balance.

• Hydrogen is 1+ and bromide is 1-, so they balance.

What is the final formula for bromis acid?

• HBr

• HBrO3

• HBrO2

• HBrO