using Different Solvents
The grounded Ixora coccinea and Beta vulgaris plant samples were extracted using the following solvents: Acetone, ethanol, methanol and ethyl acetate. The absorbance was noted to select the best choice of solvent for extraction.
Acetone, ethanol and methanol showed higher values. But, the dye extracted from acetone and ethanol did not fix to the fabric properly. So, methanol was selected as solvent for extraction of the natural dyes from the plant materials.…
Yeast are single-celled fungi. Yeast cells use an aerobic process called alcoholic fermentation to produce energy in the form of ATP. Not only does this process convert glucose into ATP, but it also produces ethanol and carbon dioxide. Along with a few other classmates, I performed the “alcoholic fermentation in yeast” lab to find the ideal conditions for carbon dioxide production in yeast.
Organisms obtain the energy they need from food. Yeast cells use sugars, such as glucose, as a food…
TEE JIN FENG 15SPE072X 27012016
EXPERIMENT 7: Cannizzaro reaction and reaction of benzaldehyde with ethylene glycol
Introduction: From the first experiment, the reaction of benzaldehyde and potassium hydroxide will produce two products which are benzyl alcohol and benzoic acid. We are going to look at how to get this two products separated by using their different chemical properties. For the second experiment, benzaldehyde ethylene acetal is formed when the reaction done under acidic…
It is the time that we put drunk driving on the brakes. Drunk driving is a very large problem, and has been for a very long while. In fact, “In 1995 more than 1.4 million people were arrested for driving while intoxicated, nearly 10 percent of all arrests made that year (Hingston 1).” Now think about how those statistics have changed over the years. My invention is the Steering Sober. It is a sleeve for the steering wheel that measures BAC levels and fingerprint to prevent carjacking and DUI.…
tubes and took the melting points of each sample, through the use of both a water bath and commercial heating apparatus.
Recrystallization: Purification of Solids
Test tube # Solvent Observations
1 Cyclohexane The liquid is clear
2 Ethanol The solution is a tinted yellow liquid at room temperature
3 Methanol Slight brown tint, unknown mostly dissolved
4 Hexanes The liquid is a very clear color
Figure 1: Table of possible solvents and their results
1. The solvent that seemed most…
A small amount of trimyristin was used for this part of the experiment, between 0.7-0.8g, was used for the hydrolysis. 25mL of ethanol and 10mL of 2 M NaOH was added to the trimyristin. The ethanol was used to cleave the polar bonds of the trimyristin and the sodium from the NaOH binds to the open oxygen on the trimyristin that formed a compound called sodium myristate. This reaction occurs slowly at room temperature…
of a heterogeneous mixture
Ji,) be a pure substance
is corrccl for ___ _ 19)
A) elements B) homogeneous mixtures
Ohcterogeneous mixtures D) compounds
20) Which of the fo llowing is an example of a lieterogeneous mixture?
@ oil and vinegar B) 70% ethanol solution
C) air D) sugar water
21) According to the Thomson model, what is the relative charge on an electron? 21)
E) none of the above
22) A pure substance has been isolated in the laboratory. Based on the two…
The purpose of this lab was to iodonize salicylamide and characterize the product in order to determine its structure. The crude product of this reaction was recrystallized using ethanol. The white crystalline product was isolated using vacuum filtration and characterized. The percent yield of this reaction was determined to be 39%. The observed experimental melting point of the product was determined to be 235-137 oC. When compared to the literature melting point 228 oC of the predicted product…
of ARP microemulsion shows in Table 1.
4. Preparation of Arp Solution
The ARP solution (AS) meant for comparative evaluation of ME-based systems was prepared by dissolving ARP (150 mg) in a mixture of 8 mL polyethylene glycol, 1 mL water and 1mL ethanol (95%, vol/vol) resulting in a solution of…
Introduction and Social Relevance
2015 was a tragic year for South Australia. 102 people died on the roads and over 750 serious injuries occurred in South Australia alone. 44 of the fatalities were young men and women who died due to driving over the allowed alcohol consumption limit of 0.05 (Responsibility, 2016). This did not however need to be the case, these fatalities would not have occurred if the drivers were tested and stopped beforehand. Over 600 000 drink driving tests occurred last…