Chemistry Ia Ib

Topics: Sodium hydroxide, Acid, Base Pages: 4 (636 words) Published: September 2, 2013
IB
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

Declaration
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.

Signature: ______________________________
Marks: ______________________________

Aim of the experiment:
The aim is to determine the water of crystallization of a diprotic acid by titration against a base.

Background:
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

Safety:
* 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
* Burette stand
* Pipette
* Measuring cylinder
* White tile
* Beaker
* Safety goggles and gloves
Method:
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...
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