Lab 2 – Water Quality and Contamination Experiment 1: Effects of Groundwater Contamination Table 1: Water Observations (Smell, Color, Etc.) Beaker Observations 1 There was no smell 2 When I pour the oil in the water I noticed the oil started to bubble to the top. So I got to stir the oil that’s when there were smaller bubbles. As I smell the water there was no smell to the water. Putting the vinegar I didn’t smell anything but I did see the water was a change it was dark that’s when I added the vinegar 4 I added the detergent and it look like a cloud with bubbles.
As mentioned in number 13, the data for the melting point makes sense because my pure product and given compound almost perfectly matched. 17. Again as explained in number 14, the TLC data made sense because my pure compound and 4-tert-butylbenzyl phenol had similar distances from the solvent origin of the plate. The presence of benzyl bromide and benzyl alcohol also explains how not all the product dissolved in the filtrate. The possible explanations and changes to make are similar to the previous questions.
92% of the non-endodontists were not aware about the use of sodium hypochlorite as a bleaching agent and considered irrigation to be its only use. Liquid chlorine bleach, an alkaline solution of sodium hypochlorite is highly effective on white fabrics and provides germicidal activity as
The selectivity to methanol was found to be larger than 95%, with the low conversion condition and CO2 as the only by-product. The skeletal copper catalyst deactivated fast, this was found to be from fouling caused by polymeric material building up. Copper chromite catalyst did not experience deactivation. Monti et al.  investigated gas-phase hydrogenolysis of methyl formate over silica supported copper catalyst.
When the incubation was complete 5 drops of reagent A and 5 drops of reagent B were added to each of the broths. If the broth turned a reddish color, the result was then positive. If there was no color change, then a small amount of zinc powder was added. If there was no color change, the result was also positive, but if there was a red coloration development after the zinc was added, the result was then negative. Both Unknown bacteria (16A and 16B) were positive for nitrate reduction.
The principle involved in this test is the precipitation of phosphate which bores a yellow-colored solution and yellow precipitate. In the sample, neither a yellow-colored solution nor a yellow precipitate appeared which indicates the absence of phosphate in the sample. In the test for Purines, or Murexide test, the standard solution used was solid guanine. The reagents used were concentrated HNO3 and 10% KOH. Positive results should be red-purple residue.
CH 204 - Introduction to Chemical Practice Experiment 2 - Qualitative Analysis of Cations Petra Hsia Stefi Hsia TA: Joey Gurrentz February 8, 2018 RESULTS & DISCUSSION In Part A of the experiment, the presence of silver was confirmed by the "Unknown 4" substance. It was discovered with two rounds of testing. In the first round, two drops of 6M acetic acid and 4 drops of 1M K2CrO4 was added to the "Step 6" test tube, the solution turned a yellow-orange color. Because there was no formation of yellow precipitate, it was confirmed that lead was not present in the solution. Since lead was not present, the "Part A" test tube, which contained precipitate from the "Unknown 4" substance, was now to be tested for the presence of silver.
They have a relatively high level of hydrophilicity. Conversely, cationic surfactants such as cetyltrimethyl ammonium bromide (CTAB) release a positive charge in an aqueous solution. On the other hand, in alkali pH, amphoteric surfactants act as anionic while in acid pH, it act as cationic. Non-ionic surfactants such as partially hydrolyzed PVA (polyvinyl alcohol) have no charge (Li et al, 2008). Among four types of surfactants, partially hydrolyzed PVA is most frequent used because it gives the smallest microsheres (Jeffrey et al, 1991).
Ponds such as disused mining pools can be used for flood storage. The objective is to divert the flood water through such ponds and thus regulate the outflow so that the flood peaks are attenuated. Water in the pond will be released slowly back to the river after the flood flow has
We can assume that the mass was very slightly decreased because of the gas created when the two were mixed but not significant enough for the scale to pick up. The mass staying the same shows that mass was not added or destroyed. The chemical equation is Mg+2 HCI→MgCl2+H2. Experiment 2 In experiment two a folded strip of white paper was placed on a circular piece of glass. The paper and glass had a combined mass of 29.1 grams before the experiment.