We’re being asked to identify the strongest acid.
All of the given compounds possess an H+ ion connected to a nonmetal and oxygen (or H+ + negative polyatomic ions + oxygen/s), therefore they are all oxyacids. We can compare their strengths using the following guides:
The strength of oxyacids is based on the number of oxygens or the electronegativity of the nonmetal in the oxyacid. An oxyacid is considered strong when there are at least 2 or more O than H.
1. When the oxyacids have an equal number of oxygens. We’ll rank their strength based on the electronegativity of the nonmetal in each oxyacid. The oxyacid with the nonmetal with the highest electronegativity will be the strongest oxyacid.
2. When the oxyacids have a different number of oxygens and the same nonmetal. We will rank them based on the number of oxygens and hydrogens in the oxyacid. The more oxygens are the more acidic.
Let's first take a look if there's a strong acid among the given:
Which of the following is the strongest acid?
Frequently Asked Questions
What scientific concept do you need to know in order to solve this problem?
Our tutors have indicated that to solve this problem you will need to apply the Identifying Acids and Bases concept. You can view video lessons to learn Identifying Acids and Bases. Or if you need more Identifying Acids and Bases practice, you can also practice Identifying Acids and Bases practice problems.