Problem: Which of the following solutions is the most acidic?(a) 0.2 M LiOH(b) 0.2 M HI(c) 1.0 M methanol (CH3OH)

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We’re being asked to identify which of the solutions is the most acidic.

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

Strong binary acids – paired with a highly electronegative atom

Common strong binary acids are:             HCl, HBr, and HI

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

Common strong oxyacids are:                 HNO3, HClO3, HClO4, H2SO4

Exceptions to the rule are:                       Oxalic acid (H2C2O4and Iodic acid (HIO3)

▪ both have 2 more O than H but are weak acids because carbon and iodine have low electronegativity

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Problem Details

Which of the following solutions is the most acidic?

(a) 0.2 M LiOH

(b) 0.2 M HI

(c) 1.0 M methanol (CH3OH)

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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.

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Based on our data, we think this problem is relevant for Professor Ervin's class at UNR.