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.
As they have cell wall, they do not explode in hypotonic atmosphere. As well as animal cells, plant cells have cytoplasm, endoplasmic reticulum, ribosomes, mitochondria, golgi apparatus, cell membrane, microtubules, nucleus, nucleolus and vacuoles. The number and
The solution turned blue. Fifth, 2.0 grams of 30-mesh zinc metal was added to the solution. The solution was stirred until the solution became clear. When the formation of gas had slowed down, the liquid was decanted into a waste container. (If any unreacted zinc remained, 10 mL of hydrochloric acid would have been added and warmed.)
g Wait another 10 seconds. Then remove a second drop of the mixture to add to the next drop of iodine. h Repeat step g until the iodine solution and the amylase/ buffer/ starch mixture remain orange. i You could prepare a control drop for comparison with the test drops. What should this contain?
The 15 M NH4OH was added drop wise until a color change occurred, or until 20 drops were added. An additional 10 drops of 15 M NH4OH were then added to each solution. Again, 5 centrifuge tubes were labeled for the same 5 cations and 20 drops of each solution were added to the appropriate centrifuge. HCl was also added to a 50 mL beaker. The Nichrome wire loop was dipped in the HCl solution and placed over the Bunsen burner to disinfect it.
This experiment can only be carried out if the solubility rules are understood and a flame test result chart is available. Materials and Methods Part 1 To commence this part of the experiment, five labeled test tubes were filled with 10 drops of their corresponding cation solutions, K+, Fe3+, Zn2+, Cu2+ and Co2+. The colors of the solutions were recorded. Next, the metal hydroxide elimination test was carried out. No more than 20 drops of 6M NaOH were added dropwise to each solution until a precipitate was observed.
then vacuum filter. * Weigh and calculate % recovery. Isolation of biphenyl * Wash organic layer with 10 ml of deionized water and discard the aqueous layer. * Add 10 ml saturated Nacl solution. * Repeat extraction, saving organic layer.
25 ml of HCl transferred to a beaker by using volumetric pipet the beaker labeled as beaker 1. 10ml of deionized water and 3 drops of phenolphalin added to beaker 1.the same previous steps did in KHP instead of HCl and the beaker labeled as beaker 2. In 100ml volumetric flask 10 ml of unknown acid solution added. Deionized water added until the mark and mix. 25 ml of diluted unknown acid solution to 100ml beaker by using 25 volumetric pipet.
DENSITY OF ANTIFREEZE- WATER MIXTURES In this experiment, several mixtures of water and ethylene glycol (the major component of ‘’antifreeze’’) will be prepared and their densities measured. A calibration curve will be generated by plotting density versus percent antifreeze, and this curve will be used to determine the composition of an ‘’unknown’’ sample mixture. WARNING: ethylene glycol major component of antifreeze is a sweet tasting, poisonous liquid. Avoid unintentional ingestion by following standard laboratory safety measures. Step 1using a clean 10-ml pipet, transfer precisely 4.00, 3.50, 3.00, 2.50, and 2.00 ml of tap water to five separate test tubes.
Plants vs. Animals Gina Morgan SCI/230 August 5, 2011 Mr. Hale Abstract Plants vs. Animals There are a lot of similarities between Plant and Animal Cells; they both contain a nucleus that has the cell's DNA, they both have mitochondria to produce energy and, ribosome's to synthesize proteins. Plants and animals also have liposome's that contain enzymes that break down large molecules and finally they both have endoplasmic reticulum that transports protein and all the other necessities that are inside and outside the cell. The differences that can be found between the plant and animal cells are that plants have a rigid cell wall chloroplasts, and animal cells don't.