A number of the reagents used in this exercise have serious hazard warnings. Look up the MSDS of ferric chloride and list the ratings for the dangers to health, of flammability and reactivity, and the amount of personal protection needed for its use Selected Answer: MSDS of ferric chloride is very hazardous skin contact (cause irritant), of eye contact (irritant), of ingestion, Hazardous in case of skin contact, of eye contact. Skin inflammation is characterized by itching, scaling, reddening, or, occasionally, blistering. Not only is it harmful to skin and eyes, it is slightly hazardous in case of inhalation. Inhalation can cause coughing, choking, or shortness of breath.
Accompanying the restriction of urinal selection is the fact that there is an interaction between the subject and the confederate. This interaction introduces the possibility of doing harm to the subject. In this instance, it could be in the form of mental direst given the added vulnerability experienced when using the urinal. Finally the lack of debriefing adds an additional element of questionable ethics. Had the subjects been informed of the study’s purpose, the question of ethics would be less ambiguous.
Wound Dressings: Wet to Dry According to the article, “The issues surrounding the continued use of saline soaked gauze dressings”, using wet to dry dressings for wounds healing by second intention may actually have a detrimental effect on wound healing and patient comfort. The article stated that saline soaked dressings may prolong inflammation by adhering to granulation tissue during debridement causing the wound to return to an earlier inflammatory stage. The author also states that this will also cause increased pain for the patient. In addition, debridement in this manner can also cause dehydration of the wound and cause further pain by exposing nerve endings to air and cold saline several times a day during dressing change. Also mentioned, is the increased risk of localized hypothermia and risk for infection as wet gauze to the wound can cause vasoconstriction and in theory, also decrease leukocyte mobility and efficiency of phagocytes.
It is a weak bond, but is decisive in controlling the structure of both water and ice. In a water molecule, two hydrogen atom are bonded to an oxygen atom share a pair of electrons between them by a covalent bond. In H2O, only two of the six outer-shell electrons of oxygen are used for this purpose, leaving four electrons which are organized into two non-bonding pairs. Salts are ionic compounds that result from the neutralisation reaction of an acid and an alkali. They are composed of an equal number of cations and anions so that the product is electrically neutral.
In redox reaction, one element or compound is reduced and gains electrons, while on the other hand, the other element or compound is oxidized and loses electrons. For this lab, through the given oxidation and reduction numbers from balancing the equation and the electrons, it was shown that Manganese was reduced while Iron was oxidized. Also from the equation, the movement of electrons can be noticed, as it was added or subtracted from the substances. In order to balance an equation, there must be same number of elements on both sides, with the exception of hydrogen and oxygen. From there, in order to balance oxygen, water molecules are enumerated to the opposite of the equation/reaction.
Other reactions can occur two ways and are known as reversible reactions. An example of such reactions is the hydrolysis of hydrochloric acid in water to form hydrogen ions and chloride ions. If irreversible reactions are left alone for a time long enough, a balance between all chemicals will occur. Reversible reactions establish a dynamic equilibrium. The proportion of chemicals in dynamic equilibrium does not change while the system continues to run.
Titration lab report Chemistry unit 3 Abstract In this investigation it was looked at the titration of HCL with NaOH, this is a neutralization reaction that is performed in lab in order to determine an unknown concentration of acid (HCL). In this investigation the moles and concentration of acid as well as the Ph of the solution were find out, the mole of 25ml of HCL was 0.65, concentration was 0.026 and the Ph of solution was 1.58Ph. Introduction Titration is a process to measure the volume of an end product, which is produced by reacting a solution of known concentration with a measured volume of a solution of an unknown concentration. The known concentration solution is called a standard solution, it will be added from a buret to allow measure the amount of solution which is added. The solution that is added by buret also called titrant.
When a person experiences stress for a prolonged period of time, their immune system may not be able to defend the body from illness and disease, and sometimes this weakness shows up as an imbalance in the form of hives or a rash.”(Easy Stress Management. http://www.stressaffect.com/stress-induced-hives.html) Hives are usually triggered by allergens; some allergens may include certain foods, food coloring, food additives, insect bites, or even an infection. Chronic stress will affect the body and cause the immune system to stop responding to the allergens. Stressful situations in your life could be and instant cause to hives. Our skin is the largest organ in our body.
* Smokers have 22% risk of cataract extraction, causing blind spot directly in line of sight. * Smoking can cause damage to Macula this is the retina of eye, the macula is used when looking directly at a item or person as well as reading. * Smoking constricts blood vessels killing the Macula. This happens when blood vessels weaken or new abnormal blood vessels grow and cause bleeding. * Once blind it cannot be reversed.
When aqueous zinc nitrate is reacted with a limited amount of potassium hydroxide, insoluble zinc hydroxide forms. 2 [pic] + [pic] [pic] Zn[pic] [Eq. 1] Zinc hydroxide behaves as a base when it reacts with acids to form salts and water. In a solution containing excess [pic] ions, Zn[pic] acts like an acid and dissolves forming the complex ion[pic]. 2 [pic] + Zn[pic] [Zn[pic]][pic] [Eq.