Problem: Classify each substance as a strong acid, strong base, weak acid, or weak base.HBr, HCl, HNO3, HClO4, HNO2, H2CO3, HCOOH, C2H5COOH, C5H5N, LiOH, NaOH, Ca(OH)2, KOH, CH3NH2

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We're being asked to classify each substance as a strong acid, strong base, weak acid, or weak base.

Weak acids and weak bases are weak electrolytes that don’t completely ionize but instead reach a state of equilibrium. 

However, it’s easier to identify strong acids and strong bases than familiarize yourself with all the weak acids (since the common strong acids have rules and are relatively fewer).

Note: Neutral amines are weak bases

Strong acids and strong acids are considered strong electrolytes. They completely dissociate into ions when dissolved in water.

Strong binary acids – paired with a highly electronegative atom

Strong binary acids are:              HCl, HBr, and HI

Strong oxyacids (or oxoacids) - have 2 or more oxygens than hydrogens

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Problem Details

Classify each substance as a strong acid, strong base, weak acid, or weak base.

HBr, HCl, HNO3, HClO4, HNO2, H2CO3, HCOOH, C2H5COOH, C5H5N, LiOH, NaOH, Ca(OH)2, KOH, CH3NH2

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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.