Batch B Experiment

Words: 484
Pages: 2
Open Document
This experiment compared several batches of silver nanoparticle solutions with a control batch that included liquid silver, sodium citrate, and glucose. The λ max of each batch were compared to the positive control batch to see how its wavelength affected its absorbance. In Part B, the assigned batch's nanoparticles, in this case "Batch B", were used under 5 different conditions and compared to a negative control to see how strong, weak or non-electrolytes affect the nanoparticles. An absorbance spectrometer was used to measure the absorbance and wavelength of the nanoparticles to get the λ max. Each reagent was used to aggregate a color change with the nanoparticles noticeable to the naked eye. Without the addition of sodium citrate in …show more content…
Sodium citrate is a partial reducing agent. Without the addition of glucose in Batch C, the nanoparticles turned more of a pale yellow color due to the same reason in Batch B because glucose, too, is a reducing agent. With the addition of 0.025 g of soluble starch into the silver nitrate solution, the reagent was a deep yellow, or a gold color. The starch stabilized the nanoparticles so that the color was very visible. All nanoparticles aggregated to at least one reagent provided. Batch D would be most supportive of creating 20 nm nanoparticles meaning that the λ max is around 401 nm. Batch D includes all the reagents, glucose and sodium citrate in silver nitrate, plus the addition of 0.025 g of soluble starch. To test silver nanoparticles as an anti-bacterial agent, one could test the application of the nanoparticles on a known bacteria and use an anti-bacterial treatment, like Penicillin, as the positive control and distilled water as a negative control. To do this they would need three plates of agar with E.coli on each plate. On plate #1 would be the bacteria and silver nanoparticles. To make the nanoparticles, one would have to mix and boil silver nitrate, a small amount of glucose, a small amount of sodium citrate, and distilled water until it is a
Show More

Related Documents: Batch B Experiment

HW 2 CEE357 2015 Solns Essay

1000 L 132,300 m3 (b) If the same extent of conversion was accomplished in a PFR, the required reactor volume would be: cout cin exp PFR 1 cout ln K cin PFR V K Q 1 ln 50 0.1 h L 75 16.1 h s s 3600 h 39.1 h 1 m3 1000 L 10,560 m3 Note that the exponential equation for the PFR is applicable because we know that the reaction is first order. The PFR is obviously a much more efficient reactor to accomplish the treatment goal. (c) A PFR can be thought of as a batch reactor that is on a…

Words 1716 - Pages 7

Slump Test Lab Report

diameter 10 cm and Height 30 cm Base plate for fixing the mould Tamping rod 16mm dia 600 mm long. Steel scale. Test procedure: Sampling: From Mixers: At least three approximately equal sample increments totaling to 0.02 m3 shall be taken from a batch during concrete discharge and each sample increment shall be collected by passing a clean shovel in to the stream of concrete. From concrete at the time and place of deposition:…

Words 3219 - Pages 13

MQP REPORT Essay

ABSTRACT This report focuses on the use of lab synthesized composite beads, made up of Xanthan Gum, Calcium Alginate and Na-A Zeolite, in adsorbing cobalt and nickel ions from nuclear power plant wastewater. The adsorption was investigated in a batch mode by changing relevant parameters including the adsorbent dosage, metal ions in solution, initial pH, temperature and salt concentration in the solution. Optimal conditions for the adsorption process were found to be pH=5 and an adsorbent dosage…

Words 8958 - Pages 36

Saponifacation of Ethyl Acetate and Soldium Hydroxide Essay

Ethyl Acetate – NaOH Reaction Kinetics Experiment Martin Novick Group 14, Chemical Engineering Laboratory Submitted to Prof. David B. Henthorn September 25, 2012 Summary The goal of this project was to determine the pre-exponential factor, k o , the activation energy, E, and the reaction rate constants, k, of the saponification process of ethyl acetate using sodium hydroxide (NaOH) at 5 temperature between 15 and 25 degrees Celsius. Two trails were performed at temperatures 16, 18, 20, 22, and 24…

Words 3356 - Pages 14

TQAS BIOLOGY Essay

answer to the nearest whole number. (b) Identify, by using the letters A to D, a part of the cell shown in Fig. 1.1 where the following substances are located. A chlorophyll B cellulose C DNA D phospholipid (c) State three ways in which the structure of a red blood cell differs from the structure of the cell shown in Fig.1.1. 1 0708-AS Biology Revision Top Priority Questions 2 2- Fig.1.2 is a diagram of a bacterium. Fig.1.2 (a) Name structures Q to S. (b) State the names of three…

Words 6635 - Pages 27

Separation of a Mixture of Solids Essays

INSTRUCTOR DR. NANCY MARASHI. | Background: During this experiment students will take a mixture and separate it into its’ pure substances. A mixture is a combination of two or more substance. These substances cannot be combined chemically but more physically. The pure substances are substances that cannot be separated any more by physical means. The students will learn the difference of these two meanings during the experiment. The pure substance will be separated by something called their…

Words 1442 - Pages 6

The Effect of Substrate Concentration on the Activity of the Enzyme Catalase Essay

The Effect Of Substrate Concentration On The Activity Of The Enzyme Catalase A Level Biology Project Aims This is an experiment to examine how the concentration of the substrate hydrogen peroxide affects the rate of reaction of the enzyme catalase. Background Information Enzymes such as Catalase are protein molecules which are found in living cells. They are used to speed up specific reactions in the cells. They are all very specific as each enzyme just performs one particular reaction. Catalase…

Words 1925 - Pages 8

Mango Case Study

for Indian type which prefer dry condition (CRFG, 1996). Normal environment without frost is preferable by mango for the productive growth. Based on Federal Agricultural Marketing Authority (FAMA) the weight determine the size of mango graded by A, B and C where ‘Harum Manis’ is the popular cultivar out of 500 varieties come from Perlis, Malaysia that fruiting season last only 2 months ( Mohd Firdaus Mokhtar, 2014) from April to June (MBG, 2015). Another famous known cultivars including Golek (MA…

Words 2506 - Pages 11

Michael Fitzpatrick Essays

create a tonic to relieve exhaustion, cure headaches, and calm people's nerves. When John was mixing his ingredients, he used a kettle so large that the only way he could stir it was with a boat oar. Then a very fortunate mistake occurred. When the batch was cooling, John unintentionally added carbonated water instead of regular water, which gave it a fizzy consistency. When he tasted it, he thought it was delicious. He quickly ran over to the local pharmacy and started selling it under the name…

Words 1706 - Pages 7

Why Are Insulators Bad

insulator effect how long ice can stay at freezing temperature? Insulators are used every day in almost everything around us, and this experiment is going to help us better understand what insulators work better. The most common examples of where insulators are used are in buildings or ice chests. There are many types of different insulators and in this experiment, the best type of insulators will be discovered by testing to see how they compare to each other when keeping water in a frozen state.…

Words 1999 - Pages 8