The reaction that occurred with this step was displacement and metathesis in the form of gas formation. The balanced equation of this step looks as follows: CuSO4aq+Zns→Cus+ZnSO4(aq) Once this step was finished, the remaining copper was retrieved. First, to recover the copper HCl was added to remove all the zinc. When this happened, a yellow tint was observed in the liquid, as well as bubbling as the zinc was broken down. Once the copper dried out, it was weighed and came to a total of 240 mg.
To observe the change in properties of various synthesized copper compounds in order to identify the reactions and products being formed. Secondly, to become familiar with methods of separating compounds through decanting, heating with Bunsen burner and suction filtration system. In doing so, be able to recover copper metal and interpret the resulting percentage yield by applying the law of conservation of matter. Upon combining 20.0mL of NaOH to 10.0mL of Cu(NO3)2 and stirring the solution, there was a darkening of the initial blue color. Adding distilled water to the solution lowers the initial intensity of the blue color, bringing back to a lighter blue.
TCB is relatively similar to Chlorobenzene in regards of being an essential part in the production of dye. TBC is also used as a dielectric fluid in transformers, and at one time used to kill termites (DHSS, 2010). Individuals who ingest drinking water containing TBC can be exposed to side effects such as neurological issues including nervousness, restlessness and/or weakness. Serious more critical side effects may also occur such as tremors, increased heart rate or blood pressure, digestive issues, weight loss, as well as headaches (DHSS, 2010). Individuals working at Ciba- Geigy Corporation may be been exposed to TBC by breathing since levels or exposure are highest where the chemical is made or used.
The acid intermediate helps prevent co-precipitation. Such quick precipitation also causes silver chloride to form into very small particles, called a colloid. To make it into a more definite form, the precipitate has to be heated and stirred gently in the presence of nitric acid. Ag+(aq) + Cl-(aq) + heat → AgCl(s) The nitric acid prevents the precipitate from reverting back to a colloid state. If the sample was to re-colloid, it would easily wash right through the filter, causing the analytical results to be low.
Combustion of organic compounds can result in detrimental impacts on the environment such as the generation of acids and production of carbon monoxide, particulates and soot. When organic compounds that contain sulphur, nitrogen are combusted, the reaction may produce gases such as sulphur dioxide, nitrogen dioxide and carbon dioxide. When these compounds react with water molecules, it will produce acids which fall as acid rain.Acids dissolve calcium carbonate, meaning that monuments made from marble and limestones are particularly vulnerable. In environmental terms, acid rain flows into water bodies. Acid rain releases aluminium from the soils into the water, an element which is highly toxic to many species of aquatic organisms.
Add the HCl SLOWLY to the magnesium by running it down the side of the beaker. Adding the acid too quickly will result in the spattering of the acid. Write down any observations of the reaction. 6. After all the acid has been completely added and the reaction has stopped, use a pipette to add a few extra drops of acid into the beaker until the reaction stops.
The composition inside the firework must however contain 5 vital ingredients: an oxidizing agent, a reducing agent, binders, a coloring agent, and regulators. “The function of the oxidizing agent is to produce the oxygen needed in order for the mixture inside the firework to burn. These oxidizers can be nitrates, chlorates or perchlorates” (www.thinkquest.org). One of the best of the three are Chlorates as they gets completely reduced as they are ignited making them better oxidizing agents, causing an over all better explosion. As shown in this equation 2XCIO 3 2XCI +3O2 the Chlorate separates completely from its oxygen feeding the flame or ignition giving it more power.
h) A way to make hard water softer is to put an sodium nitrate and create a precipitate to mellow out the reaction. Another way of making it softer is by removing the calcium ions one way of doing that is by boiling the solution to take out some of the ions. Conclusion: Overall, we determined that sodium carbonate, Na2CO3, is the anion that can be used to precipitate the most metal cations. Also, we learned that the anion sodium chloride, NaCl, could be used to remove silver ions from solutions. The stuff that I found interesting was that how many colours you can get when you mix the cations and anions
In the experiment a secondary alcohol (cyclohexanol) is heated with acid (phosphoric acid). A carbocation is generated by the loss of water from cyclohexanol because of the protonated alcohol. Loss of hydrogen ion from the carbocation will give the desired alkene (cyclohexene). Fractional distillation is used to separate liquids that have different boiling points that are relatively close together. By using this method of distillation a mixture is heated to a temperature at which several fractions of the compound is evaporated the distillate is then condensed and collected.
Lipid Oxidation Introduction: Oxidative rancidity is the major cause for the deterioration of fats and oils. When this occurs, oxygen is added to break the fatty acid chain in the triacylglycerol, and further produce peroxy radical for further oxidation of other fats. The oxidative reaction can be affected by the following factors: heat and light, catalysts (Metal) and enzymes (E.g. lipoxygenase). Although the peroxides formed are not the one which causes the rancid off flavors of oxidized fats, they are unstable once they are formed and will break down into secondary products like aldehydes and ketones whichcause the actual rancidity.