Milk of Magnesia Titration

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Sean Healy
Chemistry #1
Lab

Milk of magnesia titration

AimTo calculate the amount of Magnesium Hydroxide Mg(OH)2 in a 5ml teaspoon of Milk of Magnesia and compare this with the manufacturers stated valueHEALTH & SAFTEY lab coats, safety glasses, gloves Bags and coats were put to one side of the lab

Caution was taken while handling chemicals the chemical were all placed on labelled A4 sheets PLANNING & PREPERATION
The following equipment was gathered
250ml flask
1 litre flask
Pipette
Burette
Retort stand
Conical flask
Beaker
Wash bottle
Dropper
Chemicals
Milk of Magnesia
0.2 Hydrochloric Acid (HCL)
Phenolphthalein ( C2OH4O4 )
AIMS

The aim of this titration was to calculate the amount of Magnesium Hydroxide (Mg OH 2) in a 5ml teaspoon of milk of magnesia and compare the result with the manufactures stated value which is 415g per 5ml suspension

PROCEDURE

The equipment was rinsed out in water
25ml of milk of magnesia was diluted into; 250ml of water Hydrochloric acid ( HCL ) was made up in a flask to 0.2 molar solution 25ml of magnesium hydroxide was pippeted to a conical flask HCL was then carefully added to the burette being held in the stand 3 drops of phenolphthalein ( C 2 OH 4O4 ) (indicator) were added to the `magnesium hydroxide which turned the solution a pink colour HCL was slowly added to the magnesium hydroxide Mg(OH)2 and swirled by hand This was continued until it turned from pink in colour back to a colourless solution

The amount of HCL was then recorded in a data table
This titration was carried out four times, the first being use for a base line

Theory
Hydrochloric Acid | + | Magnesium | | Magnesium Chloride | + | water | 2HCl (aq) + Mg(OH)2 (aq) ⇒ MgCl (aq) + 2H2O (l)

Neutralization Reaction
Hydrochloric acid reacts with Mg(OH)2 the products reaction according to...
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