Chem Lab Report - The Chemistry of Natural Water By Sung Lee Chem 111 TA Seth Michalski Introduction Water is arguable the most important and

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
The Chemistry of Natural Water By Sung Lee Chem 111 TA: Seth Michalski
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Introduction Water is arguable the most important and precious thing that mother nature has given to us. It makes up about 70 percent of our body and majority of the Earth. It’s said that one survive without food for about a month and would live only for about a week without water. People drink large amounts of water daily and survive and live healthy. Beside human, other living creatures require water exist. That’s why it is very important to keep the water clean and fresh. The total water 'hardness' (including both Ca 2+ and Mg 2+ ions) is read as parts per million or weight/volume (mg/L) of calcium carbonate (CaCO 3 ) in the water.Water hardness determines if the water sample’s freshness. If the water is hard, then there are high concentrations of divalent cations Calcium and Magnesium. If there are few divalent cations found in the water then it is considered soft . Although there are many ways water can obtain Calcium and Magnesium cations, mostly the water hardness increases as the water runs through rocks that contain limestone, dolomite and gypsum. Though drinking hard water will not necessarily hinder one’s health, but it is not good to have. For instance, it’s difficult to clean with hard water since it would leave divalent cation behind. Therefore distilled water is needed to fully clean the object. Also the hard water has a bitter taste. My lab partners and I became curious of how water around us is. So we gathered water samples from around the state. One is a tap water sample that came from a well in the area of Black Moshannon State Park. A second sample was taken from Black Moshannon Dam. A third was taken from Moshannon creek; also known as the "Red Moshannon" as it is horribly polluted from mine drainage. Finally the fourth sample was
Background image of page 2
collected from Black Bear Creek. It is a prized trout fishery and a public water supply. My hypothesis of this experiment is that the water sample collected from Black Bear Creek is the softest or cleanest water out of the samples we got. I made my choice on the fact that this area is known for fishery and a public water supply. I expected that the animals that live in water are probably more sensitive to water hardness than human. Procedure To test my hypothesis, I used the PSU Chemtrek as a guide conduct this experiment. First, I needed to find water hardness of the samples using many different methods. I found the water hardness using AA Spectroscopy, EDTA titration, and TDS methods. I followed the procedures given in the PSU Chemtrek. Section A provided the direction for using AA Spectroscopy to find the water sample. Absorption Spectrophotometer (AA) is a useful technique for the determination of metals that are dissolved or suspended in a solution. AA is useful in many areas of chemistry and related fields such as geochemistry, biochemistry, ecology, polymer science, as well as many others. In order for the atom of interest to be excited, the energy of light falling incident
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 02/12/2010 for the course CHEM 110 taught by Professor Hofmann,brucerob during the Spring '08 term at Pennsylvania State University, University Park.

Page1 / 11

Chem Lab Report - The Chemistry of Natural Water By Sung Lee Chem 111 TA Seth Michalski Introduction Water is arguable the most important and

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online