Hydrobromic Acid and Hydrogen Concepts

The video tutorial explains how to write the chemical formula for hydrobromic acid (HBr). It begins by identifying the prefix 'hydro' and the stem 'brom' to determine the elements involved. The tutorial then uses the periodic table to find the symbols for hydrogen and bromine. It explains that hydrogen has a positive charge and bromine has a negative charge, which balance each other to form a neutral compound. The video concludes with a summary of the correct formula for hydrobromic acid.

What does the prefix 'hydro' indicate when writing the formula for an acid?

• The acid is organic.

• The acid contains oxygen.

• The acid is a base.

• The acid is binary and contains hydrogen.

What is the first step in writing the formula for hydrobromic acid?

• Balance the charges.

• Look up the atomic mass.

• Write the symbol for hydrogen.

• Write the symbol for bromine.

How do you determine the element symbol for bromine when writing the formula for hydrobromic acid?

• By calculating its atomic mass.

• By using a chemical equation.

• By looking it up on the periodic table.

• By using a molecular model.

What charge does hydrogen typically have when forming compounds?

• Negative charge

• Neutral charge

• Positive charge

• Variable charge

Why is the formula for hydrobromic acid HBr?

• Because bromine is in group 18 of the periodic table.

• Because the charges of hydrogen and bromine balance to zero.

• Because hydrogen and bromine both have positive charges.

• Because hydrogen and bromine both have negative charges.