ACIDS AND HOW TO FIND THE CONCENTRATION / TITRATION
Acids - Stong or Weak?
- Acids can be both STRONG or WEAK.
STRONG acids like sulphuric, hydrochloric and nitric FULLY IONISE in water. # EVERY HYDROGEN ION IS RELEASED TO BECOME A HYDRATED PROTON H+(aq). HCL + water = H+ + Cl-
WEAK acids like ethanoic, citric and carbonic partially ionise, meaning only some H+ are released so only a small number of H+(aq) are made. H2CO3 + water ->/<- H+ + HCO3-.
Titration is used to find how much acid neutralises this alkali (orvice versa).
STRONG ACID + STRONG ALKALI = ANY
WEAK ACID + STRONG ALKALI = PHENOLPHTHALEIN
STRONG ACID + WEAK ALKALI = METHYL ORANGE
What to do:
Add acid to alkali drop by drop in a BURETTE. Go slowly until…