| B | Flammable. | | Gasoline. | C | Oxidizer. | | Sodium Chlorate. | D | Poisonous.
This crude product is an approximately 25% solution of hydrofluosilicic acid and a highly toxic hazardous waste of the phosphate fertilizer industry. ii. The proper disposal of this chemical would have been extremely costly to the industry so the proposal that it could be used as a substitute for the originally favored chemical sodium fluoride, opened the door to the practice of administering it to the general public in the water supply under the guise of medication. B. At the heart of this debate is whether or not fluoridated water can be considered a medicine, thereby making it subject to strict government regulations and standards.
Lead has a shiny chrome-silver lustre when it is melted into a liquid. Certain contact with lead is poisonous to animals including humans. It causes damage to the central nervous system and can cause some brain disorders. Excessive exposure to lead, however, can cause blood disorders in humans. Lead poisoning can have fatal effects and has in many cases over the years of human inhabitation of Earth.
CADMIUM POLLUTION AND ANTHROPOLOGY by Courtney Van Gemert Cadmium toxixicity is of great concern to the world anthropologically. Cadmium is an element existing naturally in minute concentrations across terrestrial and marine environments, but greater excess levels observed are almost entirely anthropogenically introduced. Though cadmium has favorable chemical and physical properties conducive to wide use in special alloys, stabilizers, in rechargeable nickel-cadmium batteries, and as a control rod material in nuclear reactors, it is a toxic heavy metal of increasing environmental concern due to its wide variety of adverse effects [1]. Cadmium is harmful to various organs, from kidneys to the central nervous system in vertebrates, including humans. In fish, neurological functions, intermediary metabolism, antioxidant activity, epithelial transport, and other physiological and biochemical systems are damaged by cadmium [2].All of these harmful bioinorganic effects are largely due to occupational or environmental exposure to in-excess levels of cadmium through inhalation or ingestion of fine air particulates and consumption of cadmium-exposed plants, animals, or water.
Chemistry Lab Types of Chemical Reactions OBSERVATION DATA TABLE Step|Name of Reactants|Description of Reactants|Description of reaction taking place (evidence of chemical reaction)|Description of Products| 1|Zn|Solid, small chunky bits, Silvery-grey, dull|As the Zinc and Sulfur heated up it expanded in the test tube and shot out Zinc Sulfide.-light and heat are produced|White powder was created and the leftovers of the reactions was a black powder.| |S|Solid, resembles powder, Off-yellowOpaque||| 2|KI|-dull yellow liquid-transparent|Instantaneously changed colour to a bright yellow.|-Bright yellow liquid-Opaque| |Pb(NO3)2|-liquid, transparent, very clear-bubbly||| 3|H2O2|-liquid-clear-transparent|A dark grey bubbling liquid was created. It got hotter as it reacted.gas test observations:The splint relit. Oxygen was present.|Oxygen gas was created and a dark grey opaque liquid was left behind in the test tube. | |MnO2|-solid-powder-black||| 4|AgNO3|A clear, transparent liquid.|As the copper reacted with the Silver Nitrate, the ball of Copper changed colour to grey and subsequently developed a ‘furry-like’ characteristic on its coating.|-Clear liquid-Copper changes to a grey colour, ‘furry-like’.| |Cu|-brown/red-solid-stringy||| 5|HCl|A clear, transparent liquid.|When the Magnesium was inserted the HCl liquid started to bubble and fizz releasing Hydrogen. The Magnesium strip dissolved in the process and the test tube got hotter.
Extraction is a process in which metal is removed from an ore by dissolving the metal in a solvent, then recovering the metal from the solution (This is done by dissolving the metal into an acid or water). To isolate certain metals you need to take into account that some are amphoteric. Amphoterism is the reactivity of a substance with both acids and bases, acting as an acid in the presence of a base and as a base in the presence of an acid. A few amphoteric metals are beryllium, tin, lead, aluminum, and zinc. When aqueous zinc nitrate is reacted with a limited amount of potassium hydroxide, insoluble zinc hydroxide forms.
Following this, we also measured the levels of pesticides in the water, whose toxic levels range between 1-10ppb and can be fatal to some fish species. Table 2 shows the results and analysis of DDT, PCBs, and Dieldrin. Table 2. Results for pesticides in water. Sample 1 2 3 Average DDT (ppt) 0.3 0.8 0.4 0.5 PCB (ppt) 0.9 0.4 0.7 0.7 Dieldrin (ppt) 0.3 0.6 0.1 0.4 We finished part I by testing the dissolved oxygen in the water.
Leads to bad breath after drinking soda 2. Can lead to toxins from prolonged fermentation a. toxins then can be absorbed into the intestines and then into the blood stream causing multiple diseases. C. Soda has a horrible pH amount. 1. pH is a measure of acidity in a solution. The pH scale ranges from 0(most acidic) to 14.
Wasp stings are alkaline, hence acid is needed to neutralise and remove the painful sting. Vinegar (ethanoic acid) is used. Waste from Factories Waste from many factories are often acidic. If this acidic solution is not treated and enters rivers it can kill fish. Slaked lime (calcium hydroxide) is often used to neutralise the acid.
In both chemical engineering and organic chemistry, a thermal runaway reaction is a process by which an exothermic reaction goes out of control. Thermal runaway occurs when the reaction rate increases due to an increase in temperature, causing a further increase in temperature and hence a further increase in the reaction rate. This can be extremely dangerous if it happens on an industrial scale as the What causes thermal runaway reactions? “An analysis of thermal runaways in the UK has indicated that incidents occur because of either: Inadequate understanding of the process chemistry and thermochemistry. Inadequate design for heat removal.