KYAW WAI IB1I
KYAW WAI IB1I
CHEMISTRY IA (2)
TITRATION OF ACID & ALKALI
Name: KYAW WAI
Date: 5th February 2013
IA CRITERIA ASSESSED: DCP, MS
I declare that this report I have submitted is my own original work and I have acknowledged the use of words or ideas of another person.
Aim of the experiment:
The aim is to determine the water of crystallization of a diprotic acid by titration against a base.
Many substances that we use are either acidic or basic. Because acids and bases can neutralize each other, that gives us a strategy for finding the unknown concentration of an acid or base when we react with bases in a stoichiometric process we call neutralization. Generally the products of these reactions are some type of salt and water.
H+(aq) + OH-(aq) H2O(l)
Hydrochloric acid reacts with sodium hydroxide shown by this equation: HCl (aq) + NaOH (aq) NaCl (aq) + H2O
* Oxalic acid is naturally occurring, therefore is not an environmental hazard. * Disposable of all chemicals can be down the sink
* Take care not to splatter the solutions of your skin or eyes. * Wear safety gear throughout the experiment.
Apparatus and chemicals:
* Oxalic acid crystals [(COOH) 2. xH2O]
* 1.0M sodium hydroxide solution
* Phenolphthalein indicator
* DI water
* Volumetric flask (250 ml)
* Conical flask
* Burette stand
* Measuring cylinder
* White tile
* Safety goggles and gloves
1. Weigh out exactly 1.50g of oxalic acid crystals and dissolve with water and make up its volume in a 250ml volumetric flask. Fill this in the burette and attach to a burette stand. 2. In a clean conical flask, pipette out 25.00ml of sodium hydroxide solution and add 1-2 drops of the phenolphthalein indicator. 3. Titrate against the oxalic...
Please join StudyMode to read the full document