Introduction Testing and analyzing the quality of water can be used to determine if the water is safe or not to ingest. Some tests performed on water will help determine if the water is bacteriologically free, contains chemical contaminant such as nitrates, the acidity of the water itself, or to see the amount of chloride in water. Hydrology is the study of water. It has evolved as a science due to the need of understanding the complex water system and to help solve water problems (USGS). In this lab, a series of titration were conducted in order to see the amount of calcium present in different samples of water in the state of Florida. Measuring the amount of calcium in water determines how hard the water is. Hard …show more content…
In order to dissolve the solution completely, the solution itself had to have a pH of 8. To achieve this, 8 drops of ammonium buffer was added, making the remains of the EDTA dissolve completely. Titrating Water Sample #1- to test the hardness of water, the first sample used wasDasani water. 25ml of the Dasani water was poured out into the beaker. 10 drops of Eriochrome Black T indicator was placed into the water sample to make the sample turn a shade of pink. The magnetic stirrer was then placed into the flask as the flask was then placed under the burette. Titrate the solution until the solution turns a light blue. Record the change in volume of the EDTA solution. To ensure the accuracy of this process, two more trials were conducted. Titrating Water Sample #2, #3 and #4- in order to see the difference of water hardness from different manufacturers, Zephyrhills and filtered water samples were used to conduct the experiment. 10 drops of the EBT indicator was added into each of the 25ml sample and then placed under the burette to titrate. After the water sample turns a light shade of blue, record the change in volume. Repeat the process two more times for each sample to ensure accurate measurements. Titrating Tap Water and Deionized Water- 25ml of each sample was used for titration to see how big of a difference the amount of calcium was in each sample. One drop of indicator was added to each of the sample
In the Chemistry of Natural Waters Lab we were to collect a sample of water, ranging from a fountain, stream, bottle, or tap water. After we collected the samples we all did many tests to see what the hardness was for each one. Water hardness is determined by the amount of Calcium and Magnesium in the water.(2) Water that has more Calcium or Magnesium is considered to be harder than water with less of those two elements. When you use soap and detergent, this is where you see water hardness coming into play in everyday life when you are washing things.
The materials that were used to carry out the experiments on the water samples were ten testing kits. We ran 10 tests on all
19. Stir the solution with a toothpick and observe any changes. Measure the pH of the new solution and record into Table 2.
ii. The second part of the titration series involves titration of NaOH with Hydrochloric acid (HCL). Again, three reps of titration and a blank titration have to be completed. A volumetric pipet is used to measure 10.00mL of HCL into three labeled conical flasks. Then the flasks are filled with deionized water until about the 50mL mark. A buret is
iii. Materials: Distilled water, beverages (juice, soda, sport drinks), Sugar reference solutions (0, 5, 15, ad 20%) 25ml each, Balance, centigram(0.01g precision), Beaker (100-mL), Erlenmeyer flask (125-mL to collect rinse solutions), Pipet(10-mL), Pipet bulb or pipet filler
In the experiment we were determining the chemical formulas for the hydrated, and dehydrated samples. The purpose of this was to asses our knowledge of chemical formulas, and how they relate to each other.
1 Q-tip was then swirled around in the water in a test tube for each different type of water for 1 minute and the Q-tip was observed for any changes in color. The Q-tip was then rinsed by tap water from the sink as instructed by the kit’s instructions and properly disposed of. This was done for all the different types of water in both environments. Then for the tap water in both environments, bacteria was tested using the test kits. Using a dropper pipette provided by the kit, water was collected, and placed into a vial that contained a solution known as ‘purple reagent’ at the bottom. The vial was gently swirled and then placed on a table for 5 minutes and was undisturbed. The vial was then swirled again and a test strip that was also provided by the kit was placed into the test vial with the arrows on the test strip point down. The vial was undisturbed for 10 minutes, and the test strip was then observed for reddish lines within 1 minute after the 10 minutes. The test strip, vial, and dropper pipette were not rinsed, and were properly disposed of after
In order to assess the water quality of Farm Pond the class collected a variety of data. The class
poured into a clean 100 mL beaker. To dilute the buffer 12.5 mL of DI water was added to the
That is why it is of the utmost important to check the effectiveness of a hiker’s equipment. Water purification is the most important thing to have while out hiking in the backcountry. A real world scenario was the only way of being able to properly tell whether or not the Iodine tablets could be counted upon, when they are the only thing being used for water remediation. The lab procedure start by taking a river water sample from the Menomonee River, which was then separated into three 1L beakers which were then filled to the range of .95L to 1L. The water samples as is, were then swabbed for bacteria, and rubbed across a Tryptic Soy Agar plate (TSA), to facilitate growth of bacteria if any was present in the water. The water was then treated with the drinking water tablets per their instructions, and was then swabbed again for bacteria after the 35 minute mark. This second swab was then also streaked across a TSA plate in order to check if there was any bacteria still present in the water. The previous methods were also performed concurrently with three identical amounts of water from the city of Milwaukee tap water. This was done to account for any bacteria that could have entered the water from the air, due to the open air beakers. The bacteria, if present on the TSA plates, were then allowed to grow over several days, and the resulting bacteria colonies were then counted, and purification levels were compared between the drinking water tablets and the treated city
The first step in this experiment was to construct a titrator and prepare the corresponding lab materials. After assembly and placement of the titrator it was filled with 10 mL of EDTA. To rid the titrator of air bubbles a few drops of EDTA were released before conducting the experiment. The next step in the experiment was to prepare the tap water and solution of pH 10 and EBT indicator powder. The 100 mL beaker was filled with 10 mL of tap water in addition to 5 drops of pH 10 buffer and approximately 10 mm of EBT indicator powder, which was placed below the
In this lab, the pH scale was used to determine which waters are most healthy to drink. The term ph means potential hydrogen. It is a measure of the hydrogen ion concentration when talking about a solution. If a solution has a high concentration of hydrogen ions, it will have a low pH and solutions with a low concentrations of H+ ions will result in a high pH. pH is a very well known water test to ensure that the water is healthy to drink. pH reveals the water’s acidity and it is a measurement of the potential activity of hydrogen ions. The pH scale is from 0 to 14. If one has a pH of 7.0 that is considered neutral. Solutions with a pH below 7.0, are considered acids. Solutions above 7.0 are considered basic. The purpose of this lab is to conduct
The significance of titration is to find out the concentration of unknown substances. There are different kinds of titration and this experiment consists of two kinds of titration. The traditional titration uses the phenolphthalein indicator dye to determine the concentration by color change. The modern titration uses pH electrodes. The chemical reaction “H3C6H6O7(aq)+3OH-(aq)→3H2O(l)+C6H5O7(aq)” is used to determine the moles of citric acid from the moles of NaOH. The main scientific objective of the experiment is to determine the molarity of two different sodas by traditional titration and modern titration respectively.
The city of Long Beach has approximately 7 miles of public beaches all through out the city. Due to the mild climate thousands of residents and tourists visit the beaches and bays. The beaches are one of the cities most popular attractions; so this raises the concern of what the water quality is like at the beaches and bays. Roughly every week the Health Department’s Environmental Health Water Quality Monitoring Program collects samples of water and analyzes them to determine the quality of the water. Many different factors effect the water quality in Long Beach, the geographical location of the city, the man made structures, the urban runoff, and the Port of Long Beach. All of these things change and or make the water quality worse in Long Beach but there are ways in which it can be improved.
Step 1 and 2 was repeated by using distilled water by replacing the test solution.