Solubility equilibrium

benzoic acid to be covalent compounds, while the remaining substances to be all ionic. The previously stated covalent compounds all were found to have low relative melting points when heating them on a hot plate, but they had mixed results to their solubilities: citric acid and sucrose were found to be soluble in water, while benzoic acid was not soluble in water. The situation was reversed when using ethanol: citric acid dissolved slightly while sucrose did not at all, and benzoic acid was…

Table 1 provides the statistics for the first part of lab 11. In this section we used a 1:5 dilution of AdhP from our elution two. Using a spectrophotometer set to 280nm, the concentration of this dilution was found to be 0.08725uM and would be mixed with the various amounts of EtOH and NAD+. When mixed we were then allowed to observe the kinetics using spectroscopy set at 340nm. The data can be seen in Table 1 and Table 2. We were the able to plot this data using Excel thus creating Figures 1…

Analgesic drugs contain an active pharmaceutical ingredient (API) that provides it with the pharmacological properties. Active pharmaceutical ingredients consist of acetylsalicylic acid, acetaminophen, ibuprofen, or naproxen. These ingredients are also Nonsteroidal Anti-inflammatory Drugs (NSAIDs) that are non-narcotic relievers of mild to moderate pain (Medicinenet). The purpose of this experiment was to separate an active pharmaceutical ingredient from an analgesic drug using extraction with…

I learned from this activity that the dose-response curve is used to measure the relationship between the quantity of a substance (the dose) and its overall effect (the response). I was able to recognize that dose and response are related by practicing the relationship on a graph. The dose is placed on the X-axis as the concentration of substance while the response is placed on the Y-axis as a percentage. In the example that we have in step 1, the dose that results in 50% mortality of subjects…

The control was the first row for both amylases. At 0 min. neither one had synthesized anything so this served as the starting point. The independent variable was the temperature; this is what was being changed. The dependent variable was the amylase activity; this is what (should have) changed because of the temperature. The iodine was a marker. It showed whether starch was still present in the wells. From the results, starch was present in all the wells; it was present at every temperature and…

The hypothesis was that as the amount of sugar in the water increased, the amount of time it takes to dissolve sugar would increase. My group’s data from the experiment refutes this hypothesis, because the amount of sugar already present in the water had no effect on the time it took to dissolve. The only variable that changed was the amount of sugar that was already in the glass. Other variables my group attempted to avoid changing was the amount of water in the glass, how much sugar put into…

According to Simon (2002) the silica gel is the most widely used absorbent and it is the stationary phase that is dominant in Thin layer chromatography, particles or molecules that are non-polar travel faster at the stationary phase and the molecules that are polar spend more time at the stationary phase and therefore this means that molecules that are non-polar travel larger distance on the TLC plate in comparison to molecules that are polar since the polar molecules stick to the polar…

Jessica Vandeventer April 13, 2016 Energy Comparison of Fuels Purpose/Question- The Purpose of the lab is to see a comparison of fuels using a home made calorimeter. Hypothesis– The burner fuel is going to be a better source of fuel than the tea candle. Data Tables/ Graphs – Data Table 1. Mass and Density of Distilled Water. Mass of 10.0 mL of distilled water (g) Density of water (g/mL) 9.2g .92g/mL Data Table 2. Calorimetric Data. Fuel Source: Initial mass of fuel (g) Final mass of fuel (g)…

In this experiment, the components of “Wellactin A” were separated into sucrose, an unknown carboxylic acid, and an unknown organic neutral compound. The unknown compounds were identified by their melting points and the percent recovered was calculated. First, the sucrose was separated by dissolving the organic acid and the organic neutral compound in diethyl ether. 104.9% was recovered, so that means the sucrose was not entirely pure. The sucrose could have been contaminated by another…

Melting point is the technique that disrupts the IMAF’s and forces the molecule to break by adding thermal energy to increase kinetic energy to the compound. When melting the unknown the interactions within the IMAF’s of the molecule are decreasing causing a disruption within the structure of the lattices. Determining the melting point of Unknown 105 A helps narrow down the possible compound that it can be, by the given melting point range. The narrower the range represents the relative purity…