This website uses cookies to ensure you have the best experience. Learn more

Chem Labs Essay

325 words - 2 pages

INVESTIGATION 15.4: BUFFERS Background Information Please refer to pages 484-486 in the Nelson Chemistry textbook.Problem What effect does the addition of acids and bases have on a buffer? Prediction According the background information, acetic acid will act as a buffer and will prevent any drastic change in pH. Water, on the other hand, is unbuffered and therefore its pH will change proportionally to the volume of acid or base added.Materials Ø ...view middle of the document...

Prepare a 0.10mol/L buffer solution using acetic acid. Use 50mL of this solution.2. Add a moderate quantity of sodium hydroxide solution and observe changes.3. Add a moderate quantity of hydrochloric acid solution and observe changes.4. Repeat steps two and three with 50mL and use results as a control.Evidence Sample Initial pH PH after addition of NaOH(aq) PH after addition of HCl(aq) Buffer 4.75 4.75 4.75 Water 6.40 9.10 N/A Analysis It was observed that the buffer experienced no notable pH change after the addition of strong acids and bases. The following equations explain the results.Na+(aq), OH-(aq) (SB), CH3COOH(aq) (SA), CH3COO-(aq), H2O(l) OH-(aq) + CH3COOH(aq) à H2O(l) + CH3COO-(aq) H3O+(aq), Cl-(aq), CH3COOH(aq), CH3COO-(aq), H2O(l) H3O+(aq) + CH3COOH(aq) à H2O(l) + CH3COOH(aq) Evaluation This experiment can be considered adequate for answering the problem. Little could have been confused in this investigation's procedure. In the future, other buffers could be experimented with. Furthermore, substances used could be measure more precisely.

Find Another Essay On Chem Labs

Methamphetamines: Poor Man’s Cocaine Essay

1674 words - 7 pages sites, which are often in homes, garages or barns. According to the DEA Drug Fact Sheet in 2010, a total of 189 meth clandestine laboratory incidents occurred including: labs, dumpsites, chem/glass/equipment in California. Toxic gases and wastes also found at these sites can cause poisoning, burns, lung irritation, organ damage, and cancer. Residents of the sites, especially children are at great risk. According to the Office of National Drug

Nursing Care Plan Essay

8217 words - 33 pages C&S are negative. Blood cultures are also negative. Sputum C&S and Gram Stain show WBC* 25, Eph.*10 and presence of Alpha streptococcus & neisseria. LABS AND X-RAYS: CXR done on 9/3 shows normal heart size, no change in the status of pulmonary fibrosis, emphysema but there is new fluid in R major fissure. Echo done 7/22 reveals L ventricular systolic dysfunction and ejection fraction of 31%. ECG done 7/29 shows Arterial Fibrillation. CT

Molecular-based techniques

2038 words - 9 pages sequencing, pyrosequencing and reverse hybridisation. Multiplex PCR assays and also microarrays are promising approaches for routine use in clinical labs as they allow rapid identification of pathogens directly from a biological sample (Muldrew, 2009). PCR related techniques have revolutionised microbial infection diagnosis disease diagnosis. It is a reliable and rapid technique and through automation and improvements is being made more efficient and


8191 words - 33 pages to earn ISU credit. Chemistry A, B - Open to 10, 11, 12 Course Number: 5135 Prerequisite: Geometry passed with at least a B or instructor approval and Physical Science Requirement filled: Lab science Fee: $15 Content: Study of atomic structure, basic chemical relationships. Highly recommended for students interested in careers in science, medicine, or engineering. 20 CHEM 1100: Architecture of Matter A, B - Open to 11, 12 - 4 ISU Credits Course

When the Bubble Burst

1539 words - 6 pages By the time I arrived state side from my second tour in the Middle East the housing bubble had already burst. I noticed a drastic change in the way that many of my friends and family were living. Several of my friends that worked in real estate had sold their boats and seconds houses. My own stock portfolio had lost a third of its value. My sister and her husband had defaulted on their home mortgage leaving them scrambling for a place to live. I

phase diagram

4456 words - 18 pages Introduction: Chemical equilibrium is a crucial topic in Chemistry. To represent and model equilibrium, the thermodynamic concept of Free energy is usually used. For a multi-component system the Gibbs free energy is a function of Pressure, Temperature and quantity (mass, moles) of each component. If one of these parameters is changed, a state change to a more energetically favorable state will occur. This state has the lowest free energy

Revolutionary Work of Art

1890 words - 8 pages Walter Benjamin emphasizes in his essay, “The Work of Art in the Age of its Technological Reproducibility” that technology used to make an artwork has changed the way it was received, and its “aura”. Aura represents the originality and authenticity of a work of art that has not been reproduced. The Sistine Chapel in the Vatican is an example of a work that has been and truly a beacon of art. It has brought a benefit and enlightenment to the art

Enlightenment Thought in New Zealand Schools

1594 words - 6 pages In this essay I will be looking at how the political and intellectual ideas of the enlightenment have shaped New Zealand Education. I will also be discussing the perennial tension of local control versus central control of education, and how this has been affected by the political and intellectual ideas of the enlightenment. The enlightenment was an intellectual movement, which beginnings of were marked by the Glorious Revolution in Britain

Psychological Egoism Theory

2240 words - 9 pages The theory of psychological egoism is indeed plausible. The meaning of plausible in the context of this paper refers to the validity or the conceivability of the theory in question, to explain the nature and motivation of human behavior (Hinman, 2007). Human actions are motivated by the satisfaction obtained after completing a task that they are involved in. For example, Mother Teresa was satisfied by her benevolent actions and

How Celtic Folkore has Influenced My Family

1587 words - 6 pages Every family has a unique background that influences the way they live and interact with other people. My parents, who emigrated from Ireland to the States with my three brothers in 1989, brought over their own Celtic folklore and traditions that have helped shaped the way our family operates and lives. One aspect of folklore that has helped shape my family dynamic is the Celtic cross—both its background and what role it has played in our lives

Julia Margaret Cameron

1406 words - 6 pages At a time when women were looked upon as being homemakers, wives, mothers and such the late 1850's presented a change in pace for one woman in specific. Photography was discovered in 1826 and soon after the phenomenon of photography was being experimented with and in turn brought new and different ways of photo taking not only as documenting real time, but also conceptualizing a scene in which an image would be taken. Julia Margaret Cameron will

Similar Essays

Challenge Of Maintaining Homeostasis With Geriatric Patients

1768 words - 7 pages including CBC, ABG’s, Chem 8, electrolytes, blood glucose, blood cultures and uric acid. The ER tech would obtain EKG and start IV as delegated by RN. The lab tech would draw labs as delegated by RN. Respiratory technician present for monitoring airway and oxygen saturation, nasal cannula would be placed on admission due to dyspnea. Radiology would obtain chest x-ray as ordered by MD. As patients’ condition changes to unconscious and respiratory

Preparation And Characterization Of Nevirapine Oral Nanosuspensions

1045 words - 5 pages and in vivo characterization [4,15]. MATERIALS AND METHODS Nevirapine, poloxamer 407 were obtained from Hetero Labs, Hyd. HPMC was obtained from Merck India Ltd. (Mumbai). Sodium Lauryl Sulphate, poloxamer were obtained from Hi Media Laboratories (Mumbai). Tween 80 and dichloromethane were obtained from SD Fine-Chem Ltd. India. PVPK30 and carboxymethylcellulose were obtained from Merck India. Preparation of Nanosuspensions : Nanosuspensions were prepared using nanoedge method[4]. This technique has different steps. Initially

Nuclear Power For Mankind Essay

1769 words - 7 pages radioactive waste: Department of Energy (DOE), Environmental Protection Agency (EPA), and the Military/Department of Defense (DOD). Each of these agencies plays a role in producing policy and runs laboratories that research a variety of issues that pertain to radioactive waste. These labs include, but are not limited to: Sandia National Labs, the Waste Isolation Pilot Plant (WIPP), and Los Alamos. NRC's mission is to regulate the Nation's civilian use

Flame Photometry Essay

1312 words - 5 pages ]. Available:[17 April 2006]3. UK Chemistry (2000), Flame Photometric Determination of Sodium [online]. Available:[19 April 2006]4. Wikimedia Foundation, Inc (2006), Quantum Chemistry [online]. Available:[17 April 2006]5. Author unknown (2000), Principle of