It is no secret, what importance is represented by water for health of our organism. Important factor is the chemical composition of water, what impact it will have on the person depends on its quality. To make sure that water really brings benefit, but does not damage health it is necessary to carry out the analysis.
It is required to you
- - the distilled water;
- - water from under the crane;
- - buffer solution;
- - chloride sodium;
- - burettes;
- - trilon B;
- - indicator methyl orange;
- - indicator black eriokhry;
- - acetic acid;
- - ethyl alcohol;
- - sulfanilovy acid;
- - fluorescein;
- - and - naphthol.
Instruction
1. For mixing of mortar And, dissolve in one liter of the distilled water 14gr of trilon B.
2. For the analysis of constant rigidity measure hundred milliliters of water and pour it in transparent capacity.
3. Add five milliliters of buffer solution to water.
4. mix from black eriokhrom (0.5 gr) and chloride sodium (50gr), and then enter it into the previous solution and carefully stir.
5. Pour the formed solution in the burette and on one drop, constantly stirring up, add Solution A.
6. When solution is painted in blue color, stop addition of drops. Define Solution A consumption.
7. The rigidity is defined from ratio: one milliliter of Solution A is equal to two degrees of rigidity.
8. For determination of variable rigidity, pour hundred milliliters of water in transparent capacity.
9. Add to it the indicator which is previously dissolved in the distilled water methyl orange.
10. Dissolve 0.1% hydrochloric acid in the distilled water. It will be Solution B. Add on one drop of the turned-out Solution B to previous, constantly stirring up.
11. Stop addition of drops after solution becomes red color.
12. The variable rigidity is defined from ratio: one milliliter of Solution B is equal to 2.8 degrees of rigidity.
13. For determination of amount of nitrogen, prepare Solution B, by mixing of solution of hydrochloric acid with acid sulfanilovy. In the same way prepare Solution G from fluorescein and and - naphthol.
14. Gain ten milligrams of water in transparent capacity and add ten drops of Solution B.
15. Add ten drops of Solution G to the previous mix and mix.
16. In three minutes define amount of nitrogen according to color scale. Yellow color of solution speaks about lack of nitrogen, and dark red about its high content in water.