Quantitative Determination of Sulphate By Gravimetric Analysis

Analytical & Physical Chemistry ( CP4001)

Experiment 4:

Quantitative Determination of Sulphate by Gravimetric Analysis

Formal Report

Class: DFST/FT/2B/21

Synopsis

The objective of this experiment is to determine the amount of sulfate by gravimetric analysis. The amount of sulfate is determined quantitatively as barium sulphate, BaSO4, by gravimetric analysis. For the experiment, a dilute give awaycome of barium chloride was slowly added to a hot unknown sulphate solution slightly acidified with concentrated HCl. The precipitate is then filtered come to by suction filtration, washed with water and dried in the oven at 150 degree Celsius for about half an time of day and cooled in the desiccator, and weighed as barium sulphate and the percentage of sulphate was calculated from the load of barium sulphate. The Molarity of sulphate= 0.004269 M and the concentration of sulphate in g/L= 0.4098g/L. The burthen of barium sulphate was calculated to be 0.0249g. There were also no hiccups during the experiment.

(133 words)

Objective

• To determine the amount of sulphate by gravimetric analysis.

• Students can also be familiar to the ways to wait out Gravimetric Analysis through this experiment.
  
  
  
  

Theory

Gravimetric analysis has become one of the close to accurate classes of analytical methods available. Commonly, gravimetric analysis is being carried out by the following steps: (1) preparing a solution containing a known weight, (2) isolation of the desired elements, (3) weighing the separated elements and (4) computing of the amount of constituent in the sample from the observed weight of the isolated substance. Precipitation and filtration are the most commonly utilize methods to isolate the desired substances from a solution. The reagents used in the reactions bequeath form an insoluble compound with the desired constituents but not precipitate of other elements.

Firstly, exactly 25mL of precondition sulphate solution was used so that it would be a fair experiment...

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