Mole

Introduction The objectives in this laboratory were to explore the titrations of several known acids and bases as well as observing the mole reactions of the chemical reactions that each compound undertook. The four following acids and bases were used to predict when a set amount of reactant would reach equilibrium: Hydrochloric Acid (HCl), H2SO4 (Sulfuric Acid), NaOH (Sodium Hydroxide), and Ba(OH)2 (Barium hydroxide). An unbalanced equation of each reaction was given so the balanced equation…

of the final solution based on the precise volume and concentration of the initial solution. Table 2 also shows the mass of sodium acetate added for the 0.60 M solution. Tables 3 and 4 show the results for week 2 of the experiment. They state the moles of NaOH or HCl needed to reach the orange or green endpoints for each concentration of buffer using the molarity of the acid or base and the number of mL needed to reach the…

of melanoma include, the appearances of unusual moles on your body, painful itches, irregular sores, etc… Melanoma at times is hard to catch because people don’t normally keep track of the moles on their body. It’s rather difficult especially depending on their locations. Melanoma usually starts as a regular mole but later slowly starts to change and cause much discomfort. If a mole has developed a different skin shade or, if the surface of the mole has changed, it’s a sign that that person…

with a varying the amount of the second reagent used in a chemical reaction. Through these results, the concept of limiting reactants can be determined. Using a graph to demonstrate the relation between the volumes of hydrogen gas produced versus the moles of the reagents will help figure out the stoichiometric balance required. The success of the experiment will be determined by the comparing the experimental values with the fixed values. Introduction Stoichiometry involves converting…

pressure, temperature, and the number of moles of a gas.1 This has allowed scientists today to manipulate these variables in controlled lab settings, to utilize these laws in new innovations such as ventilation systems, and to explain observed biological phenomenon like breathing. Boyle’s Law, the first of these gas laws, was published in 1662, and developed an inverse relationship between pressure and volume, provided that the temperature and the number of moles of gas remained constant.1 It…

Concentration C1V1 = C2V2 1 (190 - 505) = C2 (235 - 505) 1 28.0 = C2 37.0 C2 = 2837 C2 = 0.760 mol dm-3 (±0.0500) Sample Calculation for the amount of mole in Unknown Acid Mole = Concentration Volume Mole = 0.760 (±0.0500) (235 - 505) (±0.0100) Mole = 0.760 (±0.0500) 37.0 (±0.0100) Mole = 28.0 mol (±6.73) Sample Calculation for Uncertainty of Mole ±0.05000.76 100 = ±6.700% ±0.010037 100 = ±0.0300%…

Jessica Hill CHM 144M Section C Dr. Zhu Charles Dotse Aileen Decker 8 October 2015 The Quantitative Determination of an Acid in Carbonated Beverages Abstract: The basis of this lab was to juxtapose two different titration methods in their ability to identify the end point, calculate the molarity of citric acid in the two sodas, and apprehend the differences between polyprotic and monoprotic acids. In order to accomplish this, a traditional titration, with phenolphthalein, and a modern…

volume—initial buret volume. The moles of NaOH were found using the given molarity of 0.0468M and the previously calculated volume. The moles of citric acid were calculated using stoichiometry of the reaction: H3C6H5O7 (aq)+ 3OH- (aq) —> 3H20 (l) + C6H5O7 -3 The molarity of citric acid was found from the calculated moles and the measure of volume. For the modern titration, the equivalence point for mL of NaOH titrant was found using a graph of the first derivative. The moles of NaOH were…

The naked mole rat may not look like the best animal to cuddle with but this species has very distinctive physical aspects, it’s the only mammal to maintain its body temperature in any environment. Naked mole rats also feel no pain. They have high respiratory rate and a low metabolic rate and are resistant to cancer since they lack the p16 gene, and can live…

cold" is a prefix that means just what it sounds. The term "cryotherapy" is when icy cold substances are used to destroy abnormal growths on the body's dermal layers. It's a little wordy, but that just means that it's a way to get rid of ugly tags, moles, warts etc. using the power of cold to kill them, just like you'd kill mites or ants with ice or cold products. Basically cryotherapy is one of the ways you can get rid of skin lesions and tags without having to worry about high price surgeries…