That told me it was the end point of the titration. When I added the base to the acid, I noticed that the indicator in the acid turned pink after reaching the end of the titration. Procedure Part 1: *First I had to measure the pH of 0.1 M hydrochloric acid. Get a 100 mL beaker from the equipment menu Right click on the beaker, select chemicals, and add 50 mL of 0.1 M hydrochloric acid. Measure the solution by right clicking on the beaker and choose pH meter *Then I had to measure the pH of 0.1 M sodium hydroxide Get a 100 mL beaker from the equipment menu Right click on the beaker, select chemicals, and add 50 mL of 0.1 M sodium hydroxide.
Finally, the last step involved titrating the water. The tap water and buffer solution were poured into the beaker, and the EDTA solution was titrated into the beaker. A drop of EDTA was added every 5 seconds, and this continued until the solution turned the same light blue as observed in the first step of the experiment. The amount of EDTA needed was then used to calculate the hardness of the water sample. This whole process was repeated two times for two additional trials.
Place a two-gram sample of the following compounds in a separate watch glass: * Watch Glass #1: 2g of Calcium Chloride * Watch Glass #2: 2g of Citric Acid * Watch Glass #3: 2g of Phenyl Salicylate * Watch Glass #4: 2g of Potassium Iodide * Watch Glass #5: 2g of Sodium Chloride * Watch Glass #6: 2g of Sucrose 1. Under each watch glass place a Bunsen burner. 2. In the chart provided in the observations section, record the order of melting. If the compound does not melted after 2 minutes put “no” in the table.
12 Mung Beans (6 per bottle) 10 Ml of water per bottle per day. A ruler to measure your plants each day. (cm) A data table to collect all the data you gather over your 10 day time period. Procedure: Follow the following steps: Step 1- Get 2 clear 2 liter bottles. Step 2- Clean out both 2 liter bottles for any excess soda, water, etc.
This drink is best served in a glass jar with the strawberries and basil leaves floating on top. Ingredients • 1 cup basil leaves • Tea bags • 4 cups Boiling water • 10 large strawberries (chopped) • Crushed ice Instructions • Place the tea bags in the boiling water and discard them after 15 minutes • In another container, boil 1 cup water along with the basil leaves and some sugar. Simmer for 10 minutes. • Remove this container from the fire and add the strawberries. Now refrigerate until chilled.
Procedure: Mix the two solutions together. Stir by stir bar and stir plate, swirl the mixture in the flask by hand, or mix by transferring the mixture back and forth between the two flasks. Stir until the colorless solution turns blue (about 10 seconds). Clean-Up: Remaining blue solution can be washed down drain with water . Background: For the entire explanation of this demo see Shakhashiri's Chemical Demonstrations, Vol.
The watch glass was removed with the beaker tongs. Using a rubber bulb and a stirring rod to stir the solution continuously, 15.00mL of .25M BaCl2 solution was added to the solution in the beaker. The watch glass is replaced and the solution is keep hot but not boiling for 15 minutes. The precipitate was allowed to settle. When the liquid above the precipitate was clear, the solution was tested for completeness of precipitation when a few drops of BaCl2 solution were added from a pipette.
This wide melting range also indicated impurities. Discussion: The procedure used to isolate the caffeine from a tea bag is very particular. The first step is to submerge the tea bag in hot water, much like when making tea to drink. This separates the soluble fraction from the insoluble cellulose, non-hydrolyzable, and tannins. This step is slightly different from brewing tea because only 10 mL of water is used.
They were glucose, water, lemon juice, Coca Cola, egg batter, lemon-lime soda, diet lemon-lime soda, Kraft Italian dressing, skim milk and butter. The positive control was the glucose and the negative control was the water. Twenty drops of each sample of substance was added to the test tubes (in all there were 10 test tubes). After the solutions were added in their own test tube, 20 drops of Benedict’s reagent was added. Each individual test tube was placed in boiling water and removed after 5 minutes to test if
Get 200 mL sample of polluted water and place into 250 beaker 5. Record observations of polluted water into data table 6. Take 100 mL of polluted water to the water testing stations and record data 7. Place a 150 mL beaker under pipe and carefully pour the remaining polluted water into the filter 8. Record the starting time, which is the time all the water was poured in 9.