8.4a Ionization determines strength

section 21 in the data booklet for a list of weak acids and bases

 

Ionization or dissociation determines strong or weak acid (same with base)

Strong acid ionization

Machine generated alternative text:I-IC1(aq) + ‘120(1) —. H30(aq) + C1(aq)strong acid base conjugate acid conjugate base

Weak acid ionization

Machine generated alternative text:C[13C00[I(aq) + H20(1) H,0(aq) + CI-13C00(aq)weak acid base conjugate acid conjugate base

 What is the different? Hint: look at the arrows.

Machine generated alternative text:% undissociated.• •dissociated.. .• .••. ••%STRONG WEAK

What is the ionization for base?

NaOH + H2O --> Na+ +  OH-

 

Use data loggers to investigate the strength of acid and bases

  1. The pH of weak acid is higher than pH of a strong acid of the same concentration.
  2. The more [H+], more conductive the aqueous solution is. Ie. The conductivity increase
  3. The electronic pH meter operates this way.

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