Removal of Hardness of Water Using Precipitation and Complexation Methods

2349 Words Nov 20th, 2011 10 Pages
KWAME NKRUMAH UNIVERSITY OF SCIENCE AND TECHNOLOGY

COLLEGE OF

TITLE: REMOVAL OF HARDNESS OF WATER USING PRECIPITATION AND COMPLEXATION METHODS.

NAME: KWARTENG YAW PRINCE COURSE: BSC. ENVIRONMENTAL SCIENCE YEAR: FIRST YEAR EXPERIMENT NO. : A.1.1.3. T.A.: BRIGHT KOFI LEONARD DATE: 7TH NOVEMBER, 2007.

Aims and Objectives: 1. To describe water hardness. 2. To soften hard water in terms of the species involved and the reactions they undergo. 3. To test the effectiveness of the methods.

INTRODUCTION
The experiment seeks to test the effectiveness of the two methods (precipitation and
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Report the result as ppm of CaCO3 in the solid unknown sample that was supplied to you.

CHEMICALS AND EQUIPMENT
Funnel Na2CO3 solution
Graduated cylinder Soap solution
Test tube Distilled water
A wash bottle Ethylenediamminetetraacetic acid (EDTA) solution
Hard water

PROCEDURE

|Procedure |Observation |
|A. HEATING | |
|25ml permanent hard water was heated. |Boiled within a very short time with no change in colour ad no |
| |formation of precipitate. |
|5ml of soap solution to heated permanent hard water and shaken. |Formation of curd. |
| |No formation of lather upon stirring or shaking. |
|B.
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