Sample 4 Lab

The physical properties of group 1: The physical properties of group 1 are that they have low melting points and boiling points, in addition I would like to say that they all are alkali metals which means that some of metals will have a lower melting point then the other one. Rubidium and caesium have one of the lowest melting points which means that they will burn very easily. However some of these metals have higher melting points than rubidium and caesium which happens to be lithium.

The pH scale is 1 to 14, 7 being the best quality. To the right is a pH scale. 7 is what the water should be. 7 is also what we had for the creek average. We had a higher number of rocks neutralizing acid (limestone is the stone found mostly in the creek) than the ones that don’t. this means that the acid rain we get is mostly neutralized by limestone in the stream. We get acid rain from Philadelphia. This is because of the massive steel companies. All of the toxic smoke comes over and comes down in the conodoguinet as acid rain. So the creek is non-acidic and non-alkaline.

“The pH of a solution is a measure of the molar concentration of hydrogen ions in the solution and as such is a measure of the acidity or basicity (sic) of the solution. The letters pH stand for power of hydrogen and the numerical value defined as the negative base 10 logarithm of the molar concentration of hydrogen ions.” (PH, 2002). The pH scale is from 0 to 14. When the pH is higher, the hydrogen ions are fewer and the substance considered alkaline. This means when a pH unit increases by one, there is a tenfold change in the hydrogen ion. For example, if a substance has a 7 pH, it has 10 times as many as hydrogen ions available as 8 pH. A lake having a water pH between 6.5 and 8.5 is considered to be neutral. Researchers tested Peckham Park lake water monthly from August 2015 to April 2016 for water pH levels. A water quality PH test strip taken from a jar and dipped into the lake. After a few minutes, the strip will turn a color and this color determines the pH. The jar the strips came in has a chart of the colors on the back which compared to the color on the strip. The lake tested monthly using the PH test strips, which show the pH level, hardness, toxic, etc. using color-change

In most places, people don't notice that tap water is too contaminated to be safe to drink. First of all, contaminated water can hurt you. Tap water contains trace amounts of lead and mercury which will build up in your body. Also, chlorine in water, which is used to get rid of bacteria in water, can also hurt you. Besides,

Seawater naturally has a pH of around 8.2, therefore being alkaline. However, as oceans absorb about 30% of the extra Carbon Dioxide in the atmosphere there are changes occurring within the water. The change is caused over time and makes the water less alkaline. Scientists have estimated that since the industrial revolution the pH has dropped 0.1 to 8.1. It is predicted that the pH could fal to about 7.8 by

My experience with Virginia’s water is not great. I have been in Virginia for three years. I used to live in Mongolia that has water pollution and air pollution. In Mongolia, I used to have rusty water. It had red color in it which is unpleasant to look and taste. When I was five years, I learned that rusty, red water is bad for health. Once I moved to the United States, the whole country was a cultural shock for me. I began to realize water in the United States, especially in Virginia has a salty and chemical taste in it. What I am trying to say is water felt, same as that I used in Mongolia. The water comes from the sink is just terrible compared to water I buy from grocery stores.

When comparing the conductivity of distilled water verses regular tap water, there is a noticeable difference. Tap water is not regular H2O as there are other minerals and elements in tap water that gives it a higher conductivity. Distilled water is water that has been removed of all other impurities making it the better option for the

For this lab, we decided to focus on specific parameter values in order to compare the water samples from one another. We began testing out the temperature of the waters, for little lake pond (groundwater) we found that the temperature was at 20.20C, for the drinking water (groundwater) we saw a similar temperature at 20.28C, the canal water had a slight difference at 18.53C. These measurements were taken during the morning and during early Spring, these factors could be a possible indication for the low temperatures [1]. Dissolved oxygen (DO) percentages were then taken, little lake pond had a DO of 101.50%, drinking water had 93.60% and canal had 93.91%. These percentages are within the same range due to the water being sampled during the

We have conducted 4 chemical tests to figure out how to improve our King’s Christian College Creek and our pond. We have measured the temperature of the creek and the pond so that we can see how it affects the physical, chemical and biological characteristics of the water. We furthermore calculated the turbidity of the water to find the muddiness caused by dirt, plants and animals matters floating in the water. Additionally, we have conducted this experiment to find the pH of the water. Pure water has a

Use a pool test kit to test the PH levels of your water. Make sure the PH level is between 7.2 and 7.6. This ensures the water is at a safe level. If your PH levels fall outside of these levels, consult a pool maintenance company to balance out your water quality.

The pH scale measures the relative acidity and alkalinity of a solution, but pH can also be defined as a symbol indicating hydrogen ion concentration. In an ideal human body all of the fluids are balanced evenly between acid and base. Buffers are especially useful when maintaining stability in the pH levels of body fluids. Buffers are also used to help prevent sharp changes in pH levels. Their purpose is to help maintain homeostasis within the human body. Seven in considered neutral on the pH scale, meaning it is of equal distance from acid and base on the scale. Distilled water sits at 7.0 on the pH scale meaning that it is neutral. Maintaining stable pH levels help maintain homeostasis in the human body.

Human activity greatly impacts the quality of our water and plays a large role in its pollution. After completing the Water Pollution Lab, it became evident that city water was the only type of water polluted by two contaminants: the acidity and coliform bacteria levels in the water were both unsafe to drink. To treat this water, first chorine needed to be added, then sodium hydroxide to raise the pH level, and then chlorine needed to be added again at the end of the process. When I visit my in-laws in Detroit, I always think that their water tastes like chlorine; which makes sense now that I’ve completed the lab and understand the steps needed to make the water safe to drink.

Overall, the results mainly do support the original hypothesis. Throughout the 8 days of experiment, there was no lead, bacteria, or sodium detected by the test kits or the test strips that were used in any of the waters of the water bottle brands and tap water in both environments thus proving the hypothesis that was originally posed, correct. This was the same for the tap water from Quincy, Massachusetts in both environments, thus not supporting the original hypothesis of the belief of traces of lead or bacteria in the tap water of Quincy. However, the original pH estimates for the different types of water were not correct. The hypothesis about how pH balance would decrease in the cooler environment and increase in the warmer environment

Natural rain water has a pH level of 5.4 at 20oC but when it falls below this it turns acidic this is due to the formation carbonic acid and the dissolution of CO2 in water.

Because of the qualitative nature of water quality analysis, there are a lot variety of statistical analyses that can be performed on water quality data for reporting and interpretation purposes. Though most of this statistics can be said to be intense, many inferences can be made from simple descriptive statistics such as mean, minimum, maximum, median, range, and standard