Chromates

and smooth and glossy in colonies. Under normal conditions, they can grow rapidly and divide once every 2-3 hours (Poxleitner, M, et al). This bacterium is tolerant to multiple metals and it is extremely resistant to elevated concentrations of chromate It is also used in the number of carbon sources for growth including glucose, fructose, lactate, succinate, malate and hydrocarbons (Nakatsu, C, et al). In the SEA Phage Project, Arthrobacter sp. would be helping to create more bacteriophage to continue

two solutions are mixed, they undergo a reaction that produces a pigmented or colored precipitate and also a liquid. The precipitate produced then can be fashioned into paint. In the first pigment, chrome yellow was produced. The yellow sodium chromate combined with the clear zinc sulfate created an orange liquid and a yellow precipitate. This is a metathesis reaction that causes the solution to be neutralized. The addition of sodium hydroxide causes the solution to become more basic. After the

The topic being researched is the effect of pH value on lead testing. The independent variable for this project is the liquid being used to test the lead and the dependent variable is the amount of lead that is extracted from each liquid. In our experiment we are determining how varying the pH of the test solution affects its ability to dissolve lead. This is when bivalent comes to place, which is a double charge. The term sulfide refers to bivalent. Bivalent is known as an independent variable

Chromium (Cr) is a metallic element present in soils, waters, rocks, fauna and flora, and volcanic and dust gases. Although chromium is the 22nd most abundant element in the Earth’s crust with an average concentration of 100 ppm, the free metal is never found in nature. (Emsley, John (2001). "Chromium". Nature's Building Blocks: An A-Z Guide to the Elements. Oxford, England, UK: Oxford University Press. pp. 495–498.ISBN 0-19-850340-7.) (Encyclopædia Britannica Online, s. v. "chromium (Cr)", accessed

Unit 18 B Study Guide 1. Find the solubility (in mol/L) of lead(II) chloride (PbCl2) at 25oC. Ksp = 1.62e–5. A) 1.59e–2 B) 2.53e–2 C) 6.64e–17 D) 2.01e–3 E) 2.01e–2 2. The two salts AgX and AgY have very similar solubilities in water. It is known that the salt AgX is much more soluble in acid than is AgY. What can be said about the relative strengths of the acids HX and HY? A) Nothing. B) HY is stronger than HX. C) HX is stronger than HY. D) The acids have equal strengths. E)

Fritted glass funnels are commonly used in chemistry labs. They have porous glass at the bottom that traps solids and allows liquids to pass through. Filter paper in a glass funnel will catch the solids and allow you to isolate a pure sample, sodium chromate in this case, that was formed during a chemical reaction. After the solid is separated from the liquid it is allowed to dry so any liquid stuck to the substance will just evaporate away and you are left with a pure substance. Distillation is used

Water is an essential part of the human life. According to Bob Allen, “About 70 percent of the human body is made up of water” (2007). This is a massive part of human livelihood and is manifested by the amount of water consumed daily. Water has unlimited uses and is used for hygiene and dietary consumption. Citizens often use it, but never thoroughly examine what they are consuming. Many studies have been conducted to analyze contaminants that fill water and the dangers of being unaware. The problem

Gel-Filtration Chromatography is a commonly used method used in order purify a protein from a mixture, by means of separations. Different biomolecules differ in size, or their molecular weight. In the gel matrix inside the chromatography column, there are gel beads which are porous to allow certain sized molecules to enter. The molecules that are able to enter the pores of the gel, are held in stationary phase and will elute from the column later on, these are usually smaller, to medium sized molecules

As an individual grows older, the body will also undergo changes to its system. The effects of changes on the respiratory system can cause problems to develop more easily and be more difficult to manage. Some changes that occur over time are that the nose tissue has reduced support which causes symptoms that interfere with air passage and reduced secretions causing tickling of the throat and coughing. The trachea will stiffen causing more difficulty in the coughing process making the ability to expel

result, upon heating the solution it was able to carry more than it should normally hold when it cooled, thus creating a supersaturated solution. The cations that produced color were transition metal cations, and the anions that produced color were chromate, dichromate, permanganate, and cyanide ions. Reaction A formed a precipitate, Reaction B generated heat, nothing happened in Reaction C, Reaction D generated a gas, Reaction E caused a dark wine color change. The mystery flask turns clear when not