We use cookies to give you the best experience possible. By continuing we’ll assume you’re on board with our cookie policy

Assessing Water Quality in a Stream by Chemical Means Essay Sample

essay
The whole doc is available only for registered users OPEN DOC

Get Full Essay

Get access to this section to get all help you need with your essay and educational issues.

Get Access

Assessing Water Quality in a Stream by Chemical Means Essay Sample

1. Introduction

The aim of this experiment was to investigate water quality by chemical tests with which the

momentary characteristics of the water could be assessed very precisely. The temperature, turbidity,

flow velocity, ph (measures the alkality or acidity), total hardness, ammonium, nitrate, phosphate and dissolved oxygen content (measures the amount of oxygen in water)of the water were measured.

This investigation was carried out at a stream in Bükkös.

2. Materials & Methods

a. materials

Thermometer

ph meter

Transparent plastic bottle

Test kits

Turbidity disc

Stop watch

Floating object (paper boats)

b. method

1. Measuring temperature and pH:

The temperature was measured using a thermometer, which was held into the water for 30 seconds. This was done at two different point of the stream and at the same place, the pH was measured at the same points.

2. Measuring turbidity:

The turbidity was measured using a transparent plastic bottle. A turbidity disc was put on its surface and it was then filled with water. The water was then compared to the turbidity disc’s color and thus the turbidity was determined.

1. Measuring flow velocity:

The flow velocity was measured using paper boats. A 10 meter long distance was measured and the boat was taken to starting point of the measured distance. Then, the speed of the boat was calculated. This was repeated 3 times.

2. Test kits were used to measure the total hardness, ammonium, nitrate, phosphate and the dissolved oxygen content.

3. Data

a.) The ph paper showed a green colour, the value of its pH was 7.

Place

pH

Temperature / °C ± 0.5

1

7

15.0

2

7

14.0

Table 1: The temeprature and its pH at the two places

b.) The speed of the water was tested by three paper boats with a distance of 10 +/- 0.05 m.

Observation

The speed of water / s ± 0.5

1

66.0

2

92.0

3

78.0

Table 2: The speed of the water

1. The test kits are used as the paper of instructions says.

Table 3 – The results of the test kits

Test kit

Result

PO4

0

NO3-

1

NH4+

0.2

Titration

4 ml

Total hardness of water

16 drops

4. Results/Conclusion

It could be shown that the was not polluted by acid rain or agricultural chemicals which would have swoed the extent of human interference int he nature. The pH value of the stream was 7, and its temperature was 14.5 °C. Both of these results are normal.

1. Calculating the speed of water:

By calculating the mean of the three measurements first:

s

Dividing the distance covered by the mean time:

, where s = 5 ± 1 % m and t = 78.7 ± 0.3 % s

m s-1

The runoff of water is responsible for the transport of sediment, nutrients, pollution etc. The result shows the streamflow of the stream Bükkös can provide a maintainable water cycle.

1. The chemical test kits support the idea that the water quality is good as do the results in Tabée 3. There is no extra phosphate int he water, which result in algae appearing and not letting as much oxygen as needed by the water animals.

The table also shows that the concentration of NO3- and NH4+ is low which also indicates good water quality. These substanced stimulate the growth of water seeds which provide food for fish and keep the stream clean.

1. To calculate the quality of the water, total hardness has to be calculated which is the number of drops multiplied by 0.03. Its unit is nk° or °dH, they are the same. In this investigation, the total hardness of water was 0.48 nk° or 0.48 °dH. This indicates soft water which means that the water quality is good.

As a final conclusion for the investigation of assessing water quality by chemical means it can be said that the water quality of the stream Bükkös at Pilisszentlászló is good. This was supported by all chemical evidence.

5. Evaluation

The measurements were conducted at only one part of the stream and thus the results are only valid at that area of the stream Bükkös. To improve the experiment the measurements should be taken at several different points of the stream.

We can write a custom essay

According to Your Specific Requirements

Order an essay

You May Also Find These Documents Helpful

Inorganic Chemistry

Transition elements contain ions that present in aqueous solution as complex ions. A metal ion with a molecule called a ligand are called complex ion and it attached through coordinate covalent bonds. A complex salt is an ionic compound but it differs in the fact that there are these covalent bonds attaching the metal to the ligand. For example in iron(II) ion, it exists in...

General chemistry - Titration

Introduction Titration is defined as technique whereby one solution of accurately known concentration also known as the titrant is added slowly into another solution of unknown concentration until a neutralization reaction is reached. There are several types of titration methods in chemistry. Firstly, is the acid-base titration method which was carried out during this experiment. In an acid-base titration, the acid/base with a known concentration...

Ammonium hydroxide solution

In the strong acid-weak base titration, 0. 1 M ammonium hydroxide ( NH4OH ) was titrated with 0. 1 M hydrochloric acid ( HCl ). 2-3 drops of phenolphthalein were added as indicator into the conical flask which contains 25mL of hydrochloric acid. Ammonium hydroxide was then titrated slowly into the conical flask and the conical flask was swirled gently to ensure the reaction is...

Chemistry Laboratory Safety Manual And Sample Lab...

SAFETY IN THE LABORATORY Safety in the laboratory must be emphasized. The compounds you will work with do have some hazards associated with them. Therefore, it is important to follow the safety rules outlined in this lab manual. You should assume that all compounds encountered in the laboratory are toxic and handle them accordingly. Safety goggles for eye protection are recommended and lab coats are...

Production of sulphur dioxide

Introduction Currently, fertilizers used on the West Coast are made and then transported from other parts of New Zealand. Because fertilizers have a reasonably large mass the cost of this transport can be expensive. This report will investigate the processes involved in making superphosphate fertilizer, including the manufacture of sulfuric acid from sulfur using the contact process. Also in this report will be an outline...

Get Access To The Full Essay
icon
300+
Materials Daily
icon
100,000+ Subjects
2000+ Topics
icon
Free Plagiarism
Checker
icon
All Materials
are Cataloged Well

Sorry, but copying text is forbidden on this website. If you need this or any other sample, we can send it to you via email.

By clicking "SEND", you agree to our terms of service and privacy policy. We'll occasionally send you account related and promo emails.

Your Answer Is Very Helpful For Us
Thank You A Lot!

logo

Emma Taylor

online

Hi there!
Would you like to get such a paper?
How about getting a customized one?