ch 17 chem

• Buret - long tube
• analyte - solution in flask
• titrant - solution in buret
• indicator - dye to help visualize equivalence point

Endpoint - when a color change of indicator occurs

Equivalence pt- when stoichiometric amounts of acid and base have combined

ideally, choose indicator so that equiv. pt = endpoint

NaOH, KOH, LiOH, RbOH, CsOH, Ca(OH)2, Ba(OH)2, Sr(OH)2

When a weak acid (acetic acid for example) and a strong base (NaOH) combine they form water and the sodium acetate salt. Sodium can be considered neutral since its Ka is incredibly minute. Acetate, however, is basic since it is the conjugate base of a weak acid. This contributes to the equivalence point being beyond a pH of 7.