Hydroxide

synthesized luminol by reducing 5-nitro-2,3-dihyodropthlazine-1,4-dione, using sodium hydrosulfite (Na2S2O4) and 3M sodium hydroxide (NaOH). The amount of luminol collected was 0.2693 g with the percent yield of 161%. The product of the first reaction was then used to recreate the chemiluminescence experiment by mixing luminol, oxidizing agent (hydrogen peroxide), and base (any hydroxide base). This reaction emitted a blue light along with yielding phthalate salt. The experiment showed the…

The easiest liquid to identify was Ammonium hydroxide (5), due to its characteristic pungent smell. The solid 7, copper sulphate was also easy to identify due to its blue crystals. Once these was eliminated, the two black powders suspected to be CuO and MnO2 were reacted with the other three liquids…

Introduction In this experiment, the goal was to isolate an organic substance. Using extraction, a basic, acidic, and neutral substance was expected to be extracted from the original unknown compound. Extraction is a process that allows the separation of substances that were previously mixed together through the use of a solvent1. This can be useful in situations where the substance has both the desired product and undesired byproducts in it. In order for extraction to work, the solvent must…

INTRODUCTION 1.1What is an acid-base titration? An acid –base titration is the determination of the concentration of an acid or base by neutralizing the acid or base with an acid or base of known concentration. An acid-base titration is the analysis of the concentration of acids and bases; through this process an acid or base of known concentration neutralizes an acid or base of unknown concentration. The neutralization of an acid or base in acid-base titration can be measured with either a…

brands of vinegar to see which is the most cost effective. Materials – • Apron • Safety Glasses • Hair Tie (If appropriate) • 50mL burette • 250mL conical flask • 2 x Beaker • Measuring Cylinder • Labels • Pencil • Standard solution of Sodium Hydroxide, NaOH(aq) • Two different brands of vinegar • Phenolphthalein Indicator • A clean white tile • Distilled water • Retort Stand • Funnel • Electronic Balance Method – Pre-Practical 1. Put on and tie up safety apron. 2. Put on safety glasses. 3.…

information is provided, the known concentration of NaOH(aq) is 0.25M. It is necessary to rinse out the burette with sodium hydroxide solution before starting titration, as the concentration of the base can be affected by the water used to clean the burette. At the same time, when cleaning the burette it may not have been washed thoroughly . By rinsing with sodium hydroxide solution, it ensures that the burette is clean and will not affect the results of the experiment. Running a particular…

of ZnO Nanostructures ZnO nanoparticles were prepared by using the following reagents : Starch solution Zinc nitrate hexahydrate {Zn〖(NO_3)〗_2 .6 H_2 O} Sodium hydroxide { NaOH) Freshly prepared ammonia solution. In order to prepare 0.01M of ZnO nanoparticles, the following steps were followed: The 0.01 M of Sodium hydroxide { NaOH} solutions in starch was prepared by adding 0.04 gm of NaOH powder dissolved in 100 ml of 3% starch solution. The solutions were stirred for 1 hour at the…

acetate and hydrochloric acid do not mix then the caffeine is separated from the paracetamol and ethyl acetate mixture. The aqueous layer is separated into a conical flask and then into a clean separating funnel to which sufficient amount of sodium hydroxide solution is added until the solution is alkali to universal paper. This allows for the caffeine to be restored to a neutral charge, then 10cm3 of ethyl acetate is added which is soluble in caffeine but immiscible to the aqueous layer…

substances and finished products in a multitude of solvents. In the testing of the four starting substances for the soaps, the group found that all the substances were insoluble in water and hydrochloric acid. However, vegetable oil was soluble in sodium hydroxide whereas the rest of the substances were not. This proposes that the beginning substances for the soaps are non-polar organic materials, as shown on page 59 of the lab manual1. Then, they tested the four soaps and two detergents that…

specifically hydrochloric acid. The acid reacted with basic elements of the mixture and allowed for the simple extraction of the unknown basic compound. The same idea was then again applied when extracting the acid, a bas was used more specifically sodium hydroxide. The acid reacted with this base and separated off allowing us to drain in…