Ph Levels Lab Report Essay

1. Record your hypothesis about what will happen when Biuret solution is mixed with the solutions from test tubes 1, 2, 3, and 4 here. Be sure to use scientific reasoning to support your hypothesis.

Purpose/Hypothesis: The purpose of this experiment is to use both cabbage juice and pH paper to determine the pH of household items. This way, we can tell which products are basic and which one are acidic. If we use cabbage juice as an universal pH indicator by comparing it to pH paper then pH determined by the cabbage juice will be unstable because by using cabbage juice, it can be different depending on how diluted it is.

For part B, 50 mL of an assigned 50 mL pH solution of either 1 M HCl, 1 M NaOH, lemon juice, and 50 mL of household bleach all in separate 250 mL beakers are to be used. For part C, a hot plate or ice are to be used to make the 1.0 mL assigned temperature specific water. This experiment will also use the 1.0 mL of 0.1 Phosphate buffer.

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 purpose of the experiment was to test the levels of water contamination in each beaker to see how high each vial would contaminate the water based on the color the water became once each vial was poured into the given beakers. In Experiment 2: Water Treatment, I used potting soil, sand, activated charcoal, gravel, alum, bleach, and beakers with my own-supplied tap water. The purpose of this experiment was to see if the different particles placed in the tap water could be removed by various filtration techniques. In Experiment 3: Drinking Water Quality, I used several various test strips, each individual strip testing for ammonia, chloride, 4-in-1, phosphate, and iron, along with samples of Disanti bottled water, Fiji bottled water, and my own tap water from home. The purpose of this experiment was to determine if bottled water is any more or less filtrated than my own tap water at home.

“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

1. What was the purpose of using water as a sample in some of the tests performed in the lab? (2 points) to have a control.

The number of electrons forming a charge cloud around the nucleus is (pick one of the following) greater than; equal to; smaller than the number of protons in the nucleus of the atom.

twice. Place the pH probe in the beaker and record the pH in the data table. Drag the beaker to the red

Abstract: During this lab, the pH of water in soil from a man made garden, a deciduous forest, and a river bank were tested after leaving it in containers for one, two, and three hours, coming out to a total of three trials with three different soils all together. After testing the pH of the water when being added to the soil for the desired amount of time and comparing it to the original water with no soil added, is then when each pH difference was observed and recorded in a a notebook, while pictures were taken of the experiment being conducted.

To improve the results from the experiment buffer solutions that were not whole pHs could have been used e.g. pH 4.5, 5.5 etc. This would have provided more reliable results as a wider range of results would have been produced. Using pHs with decimals would also help to more accurately determine the optimum pH as the optimum may have been above or below the pH stated in the hypothesis; 8. In this experiment however the optimum is taken at 8 because the graph does not rise again.

By first measuring the pH levels of solution A through E with a pH meter, it gives a numeric reading to ph balance to a solution. Next, add in a natural indicator called anthocyanin made from the pigment from a red cabbage into each solution and mixed it until there is a distinct color and recorded on the chart. Finally, by looking at the result of the pH reading level that

My science fair topic will be measuring the acidic levels in different companies of water bottles such as Aquafina, Dasani, Evian, Fiji, Miami Dade Tap Water, Penta, Publix Spring Water, Smart Water, Smart Water, Volvic, Voss, and Zephyrhills. Bottled water has been tested for its ppm (parts per million) to measure the amount of particles inside the water. The pH scale is a measurement of how acidic or basic an aqueous solution is. The pH scale has a range of 0-14; numbers less than 7 are considered acidic and numbers greater than 7 are considered basic. An acidic pH level means that the solution has more free hydrogen ions, and a basic pH level means that the solution has more free hydroxyl ions. pH is reported in logarithmic units and an increase or decrease of one on the pH scale has a 10-fold change. The negative logarithmic of the hydrogen ion concentration calculates the pH level of a solution. This is why pH stands for the potential of hydrogen and it calculate din

The start of the experiment consisted of filling up four beakers with de-ionized water to 150 ml. After the beakers were filled to the appropriate amounts they were then labeled with the

A color code was used to tell what the pH of the water was. For example, if the pH was 6, the pH test paper would turn into the color yellow, and if the pH was 7, the pH test paper would be a light green. Identifying the pH based on color could have slight human error as the pH could actually be 6.8, but when the pH of the water was tested, it could have been seen as a light green instead of a darker yellow green, thus the pH would be identified as 7 instead of the proper 6.8. Another issue that could’ve been caused from human error was that when measuring the amount of water by using a graduated cylinder, it could’ve been measured a slight bit off. Originally, the amount of water that was used for testing was 25mL. However, when measuring the amount of water, the water could’ve been 24.9 mL instead of 25mL due to the miniscus being formed and where the meniscus was believed to be. This would cause the amount of water being tested not the same for all the types of waters. Another issue that could’ve affected the result was that the refrigerator that held the test tubes that were in the cooler environment was frequently