Strong Acids (memorize!)

HCl, HBr, HI
HNO₃, H₂SO₄
HClO₃, HClO₄

Strong Bases (memorize!)

Group 1 hydroxides: LiOH, NaOH, KOH, RbOH, CsOH
Heavy Group 2 hydroxides: Ca(OH)₂, Sr(OH)₂, Ba(OH)₂

Conjugate Pairs

Conjugate acid: Add H⁺ to a base (e.g., NH₃ → NH₄⁺).
Conjugate base: Remove H⁺ from an acid (e.g., HF → F⁻).
Strong acid → very weak conjugate base (and vice versa).

Comparing Strength

Binary acids in same group: strength increases going down (HF < HCl < HBr < HI).
Oxyacids with same central atom: more oxygens = stronger acid.
Higher Ka = stronger acid.

Acid/Base Strength

Identify strong vs weak acids/bases, compare relative strength, and find conjugate pairs.

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Global All-time Score

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