Sulphuric

The purpose of this lab experiment is to study a simple esterification reaction, producing acetylsalicylic acid (aspirin), thus becoming familiar with synthetic chemistry tools and techniques. Introduction1 Organic molecules can be classified based on the functional groups that they possess. One of these classes is esters, which are produced from an acid and an alcohol as shown in the following figure. Figure 1: Reaction of a carboxylic acid and an alcohol to form and ester.2 Based on the

concrete blocks were measured. Using the balance the masses of the concrete blocks and photos values were determined. The cement specimens were examined under microscope All concrete blocks were placed in separate plastic bags .The sufficient sulphuric acid solution was added to the bags with 2 specimens (mortar mix and pea gravel).The sufficient sodium hydroxide solution was added to the other bags with 2specimens (mortar mix and pea gravel) and water was added to the bags with final 2 mortar

LAB 2: DATE: 29TH September, 2011. FORM CLASS: L6 3 SUBJECT: Biology TITLE: Quantitative Glucose Test AIM: To determine the amount of glucose in three unknown samples namely A, B and C INTRODUCTION: Biological molecules are held together by covalent bonds, hydrogen bonds among others bonds in various ways to produce large molecules called macromolecules. Simple organic compounds and macromolecules molecules vary in structure and can be distinguished by their functional groups. Molecules of a certain

argon, helium and neon. The closest layer to the surface of Venus is a thick layer of carbon dioxide, which is much denser and hotter than that of Earth. There is early evidence that sulphuric acid also lay within the atmosphere of Venus, as another layer within those that surround Venus is consisted of sulphuric acid. The atmosphere of Venus circles the celestial body in just four day due to its “super rotation” and “vigorous circulation”. Venus is the hottest planet in our Solar System even though

Equation for the reaction : CH3COCH3(aq) + I2(aq) ——> CH3COCH2I(aq) + H+(aq) + I–(aq) Iodine + Propanone —> Iodopropanone + Hydrogen (cation) + Iodine (anion) Introduction: Aims: To vary the concentrations of each reactant along with the sulphuric acid in order to observe and measure its effect on the overall rate of reaction in absorbance using colourimetry. 2) Calculate the a mean rate constant using orders of reactions and the rate equation allowing for the overall order or reaction to

surface and ground water (Cereceda, 2007). First, there is the problem of Acid Mine Drainage, or AMD. Naturally, sulphuric acid is produced when sulphides in rocks are exposed to water and air. AMD, however, is a result of this process being greatly magnified. Large quantities of rocks containing sulphides are excavated in these open pit mines, reacting to water and air and creating sulphuric acid. This acid leaches out of the rock, sometimes for

difficult to assemble. This was the first step needed so that the experiment could begin. 2. Slowly add about 1 ML of concentrated sulfuric acid and an anti-bumping granule. The concentrated sulphuric acid was used as it acts as a catalyst and speeds up the reaction. A problem with this is that the concentrated sulphuric acid is very dangerous so we had to be very careful and wear the correct protective clothing. 3. Assemble the glassware for reflux. The glassware was difficult to assemble. This was used

and then pressed back on to secure. Wearing goggles here is advisable to protect against acid being flicked into your eyes. Remember: safety first! Step 3: Each of the newly exposed chambers contains one battery cell, filled with a solution of sulphuric acid which evaporates over time. Top up this solution with the de-ionised water, covering the lead plates visible within the cells. Leave the covering cap off the battery and connect your 6 amp charger, leaving the battery to charge for several hours

In this experiment, dehydration is carried out using cyclohexanol to obtain cyclohexene. This acid-catalysed reaction involves E1 elimination mechanism. The dehydration of alcohol will remove OH- from cyclohexanol to form cyclohexene. Cyclohexene contains a single double bond in the molecule. It is a six carbon aromatic hydrocarbon. Phosphoric acid is mixed with cyclohexanol in the round-bottomed flask and is heated. The phosphoric acid act as a catalyst that increases the rate of reaction but it

solution used. Materials: • Selection of syringes – 5cm3, 10cm3 • 100 cm3 glass beakers • White tile • Timer • Lab coat • Gloves • Safety goggles • 1 mol l-1 sulphuric acid • 0.1 mol l-1 potassium iodide • 0.1 mol l-1 hydrogen peroxide • 0.005 mol l-1 sodium thiosulphate • 1% starch solution • Deionised water Hazards: Because sulphuric acid is both a strong acid and a powerful dehydrating agent, it must be handled with great care. Both sulfuric acid and hydrogen peroxide can irritate the skin