Chemistry - C3 - Acids and Titrations

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

Titration is used to find how much acid neutralises this alkali (orvice versa).

Indicators:

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…