Determination of water hardness using a titration lab report

Determine the unknown calcium concentration in a sample of water.

determination of calcium by edta titration lab report

The complex that is initially formed is red. However, it can still be used only if liquid detergents synthetic are used instead of bar and powder detergents. These findings suggest that the water source in the laboratory is very hard. Nonetheless, high levels of total hardness are not considered a health concern.

Repeat this titration with all three trials and record the volume. Titrate with EDTA until a blue color appears. Then, the total hardness of water was then determined to be Make sure it is blue and not purple.

determination of hardness of water by edta titration method

Calcium carbonate concentration expressed in parts per million are usually the criteria for the determination if a particular water sample is hard. Experimental: To begin this experiment, prepare 0. In the reaction with the EDTA, calcium carbonate is converted to calcium chloride.

Determination of water hardness using a titration lab report

Online Journal Hepler, P. In the experiment, EDTA will first be made and then standardized. Hem, J. This indicator will be cause the solution to be red at the before the titration and then at the endpoint, the solution will turn blue. Two more replicates were done to obtain the average hardness of water. If the solution is turbid, add a few drops of 0. According to an online article from U. Quantitative Chemical Analysis, 12th ed. This error is equivalent to 0.

Now, standardize the EDTA solution. Dilute with water to the mark and mix the solution thoroughly.

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Lab5 determination of hardness of water