Exercise 1 1. Suppose a household product label says it contains sodium hydrogen carbonate (sodium bicarbonate). Using your results from Data Table 1 as a guide, how would you test this material for the presence of sodium bicarbonate? B BoldI ItalicsU Underline Bulleted list Numbered list Superscript Subscript33 Words If I had a household product labeled sodium bicarbonate, I would add an acidic substance and expect bubble to be created. As we know acid reacts with bubbles when combined with sodium bicarbonate.
Paragraph 1 The objective of the experiment is to test; how will water temperature affect the rate of reaction of an alka-seltzer tablet? The dependent variable of the experiment is the dissolving time. When an alka-seltzer tablet starts to fizz it begins to dissolve, due to the citric acid and sodium bicarbonate the tablet contains (Clark, “Why does Alka-Seltzer fizz?). When the tablet is in solid form, the two ingredients are not yet mixed together, but by dropping the tablet in water, a chemical reaction is catalyzed between them, creating a fizzing sensation (Clark, “Why does Alka-Seltzer fizz?). When the sodium bicarbonate is placed in water, it begins to split apart and form bicarbonate and sodium ions (Science Buddies, Carbonation Countdown:
Then, reweigh the cylinder to the nearest milligram. Calculate the density of the water then compare the measured density of the water with the value from the handbook for the temperature of this lab experiment. Now grab an unknown liquid and record the ID number and determine and verify the density of the unknown liquid. The same method is to be used as described for water. III.
In the next steps the density of water between 30-40 °C, 40-50 °C and 50-60 °C was measured. Then our results ρ vs T and also density vs temperature values given in the Steam Tables were plotted on the same graph in order to compare. In the second part the density of water was measured by density bottle. The densities obtained from the experiment are 995, 992.5, 991, 990 kg/m3 for the first part and
The three medication I have decided to use is Furosemide, Bumetanide and Torsemide Loop diuretic act on the sodium, potassium and chloride in the ascending loop of Henle to inhibit the reabsorption. The loop diuretics achieve this by competing with the negative chloride ions binding site. Magnesium and calcium reabsorption in the thick ascending limb is dependent on the positive lumen charged gradient set up by potassium recycling through renal outer medullary potassium channel. Loop diuretics also inhibit their reabsorption. By disrupting the reabsorption of these ions.
Abstract The purpose of this lab was to identify the unknown and find out which solution is solubility. The test was done to determine the identity of the compound include solubility test, flame test, formation of precipitate and last PH test. It was found that the unknown compound smell like chorine, was soluble in water. The flame test matches the color of calcium chorine indicating that the unknown compound contained chorine, also the anion test sodium chorine proved to be positive. Resulting in the experiment that the unknown compound was chorine.
To understand this lab completely, it is important to know the concepts limiting and excess reactant. A limiting reactant is the reactant that limits the amount of product that can be produced in a reaction. An excess reactant is the opposite, or the reactant that remains after a chemical reaction is performed and the limiting reactant runs out (Stoichiometry: Limiting). The stoichiometry calculations determining what should happen can be found in the calculations section. The solid should form calcium carbonate.
In the Oxidative fermentation tube the media was a differential media that helps determine whether specific bacteria can oxidize or ferment to metabolize glucose. Citrate test checks to see which bacteria could citrate as the only source of carbon. A positive test shows that an alkaline environment ia created and that the pH level rose. The color of the media changed from green to blue if its positive. The Bile Esculin agar test has its medium as selective and differential.
In addition, phenolphthalein was added as an indicator. The aliquots were titrated against sodium hydroxide (NaOH) solution until end point was reached, after which volume of NaOH consumed was recorded. The value of the rate constant, k, obtained was 0.0002 s-1. The experiment was then repeated with 40/60 V/V isopropanol/water mixture and a larger value of k = 0.0007 s-1 was obtained. We concluded that the rate of hydrolysis of (CH3)3CCl is directly proportional to water content in the solvent mixture.