Nitrates

of Potassium Nitrate Analysis Raw Data: Solubility and Recrystallization Temperature of KNO3 in Varying Volumes of Water Volume of Water (cm3) Recrystallization Temperature (°C) Solubility (g/100cm3) 5.0 - 130 8.0 65 81.3 11.0 43 59.1 14.0 29 46.4 17.0 25 38.2 21.0 23 31.0 Qualitative Data: Recrystallization of KNO3 in Varying Volumes of Water Volume of Water (cm3) Observations 8.0 • 28°C: Potassium nitrate can be observed at the bottom. • 40°C: A small portion of potassium nitrate was dissolved

The Collection The Douglas Fairbanks Nitrate Stills Collection is a rare and treasured group of artifacts from the silent film era. They provide abundant evidence of what was expected of the stills photographer on a film set from several of his well-known films. They are a crucial aspect in researching the history of early filmmaking, as well as the unit stills photographer. Douglas Fairbanks Sr. was one of the most popular silent film star in the 1920s, which appropriately led to him being

Materials Used. For silver nanoparticle synthesis, silver acetate (AgAc-166.91g/mol) was procured from Sigma Aldrich and oleylamine from. Thiol terminated polystyrene (PS-SH) Mn-1100, Mw-1230, PDI-1.12 was procured from Polymer Source Inc. Canada. The polymer for micelles Polystyrene-b-4vinylpyridine (PS-b-4VP) Mn(PS)=18,500; Mn(P4VP)=40,500; PDI-1.10 was procured from Polymer Source Inc. Canada. The Si sol precursor tetra ethyl orthosilicate (TEOS) was procured from Sigma Aldrich. Sodium borohydride

Iron (III) Nitrate and Potassium Thiocyanate Analysis When the light yellow iron (III) nitrate solution was added to the colorless potassium thiocyanate solution, the color of the final solution was red. To understand why this happens, the individual reactants must be examined. The potassium thiocyanate solution can be broken down as follows: KSCN(aq) ↔ K+(aq) + SCN–(aq). Both the potassium ions and thiocyanate ions are hydrated with water molecules. Similarly, the iron (III) nitrate solution

Aluminum isopropoxide (Al(-O-i-Pr)3) and aluminum nitrate nonahydrate (ANN) were used as alumina sources and tetra ethyl orthosilicate (TEOS) as a silica source. Mullite precursor gel solution was prepared by dissolving stoichiometric amounts of aluminium isopropoxide and TEOS in the aqueous solution of aluminium nitrate nonahydrate and stirring it vigorously for 2 hours. The molar ratio of Al(-O-i-Pr)3/Al(NO3)3.9H2O was kept at 7:2 in order to form spinnable sols and the mole ratio of Al/Si was

The purpose of the lab copper- silver nitrate reaction is to find the mole relationships between reactants and products. My hypothesis was that the mole relationship between silver and copper will be 2 mol Cu: 1 mol Ag ratio. My hypothesis is supported by the data I found during the lab. First evidence, in the beginning of my calculation I have to determine the mass of copper that reacted during the experiment and converted to moles of copper and got .0033 moles of Cu. Next, I determined the mass

guiding question in this lab “What is the percent yield between the reaction silver nitrate and copper?”. There are two key words in this lab, theoretical yield and experimental yield. Theoretical yield is is the amount predicted by stoichiometric calculations. Experimental yield is the actual yield the amount produced in the experiment. In this experiment we had a gram of copper and placed it in the silver nitrate. Our group got a theoretical yield of 4.28 grams. We watch these two substances react

This reaction is observed to be an SN1 reaction which was later verified by the silver nitrate test. The percent yield obtained for mass was 28.9%. The reason the percent yield was low could be due to the loss of product. This could have happened in several ways including the loss of the organic phase during extraction where too much of the organic phase could have been extracted resulting in less of the product being formed. The lower percent yield may also be due to the reaction not going to completion

Strontium nitrate, the limiting reagent, was poured into the copper(II) sulphate solution, the excess reagent, rather than the other way around. This is a minor systemic error, because even if some of the strontium nitrate remained in its initial beaker, the beaker was thoroughly rinsed out multiple times. The error causes the final mass of the filter paper and precipitate to be slightly decreased, as not all of strontium nitrate reacts with the copper(II) sulfate. This can explain why the percent

4) Can of Crisco shortening: This device can be use (rub) on the skin to protect the skin against cold. Also, it be lighted with the steel wood and more shining light will be produce. This could help with the rescue. The empty can be use to melt and snow for drinking water. It is better to dry warm water than eat ice in this situation since warm water will provide warmth to the body 5) 20 x 20 ft. piece of heavy-duty canvas: Since canvas is use in making tents, they can use it to produce a shelter