Copper sulphate solution

and form highly conducting solutions. Water, deionized and repeatedly distilled with alkaline KMnO4, is usually considered as pure. The purity is checked by conductivity measurements. The volatile and organic impurities [36] are removed by passing the distilled water vapour through a column containing Pt catalyst at about 800C over which oxygen also simultaneously passed. Acetonitrile is perhaps a solvent with inert electrochemical

need different methods of extraction. Now, the methods of extracting metal do not come cheap, nor does refining and purifying metal. Not only will you need special equipment for their extraction, but you will also need other elements as well such as copper, zinc, mercury, among others, for the purification and refinement processes. Some of these elements are very harmful and toxic not only to humans and animals but to nature as well, worsening the environmental impact of metal extraction. Aside from

Instructions: Type your name, class and teacher’s name in the space provided at the top of page 1. Type your answers in the space provided using Font size 11 in Calibri. Do not go over the space allocated. Use your own words. Plagiarism, copying the work of others, will result in a ‘zero’. Your task must be submitted through ‘Turnitin” (www.turnitin.com) on or before the due date. Your class teacher will schedule a lesson to run through this process. You must also submit a printed hard copy to your

Preliminary Chemistry Assessment Task 1 Jessica Kuang 11CH3   Question 1: (4 marks) Construct a timeline to summarise the development of the Periodic Table and the major contributions made by notable scientists (up to G Seaborg)   Question 2: (8 marks) (a) The elements lithium, sodium and potassium formed one of the original triads used to show that elements could be ‘grouped’. What scientific evidence did scientists have to justify this grouping of elements? Johann Dobereiner

the average life varies a lot, dependant on exposure, but poses a serious issue that many in the past have noted. On the contrary, the development of chemical treatments greatly increased the life of the timber. The expected service life of CCA (Copper Chromate Arsenic) treated sapwood is 20-50 years, depending on end-use and exposure conditions. Manufacturers who supply the timber, guarantee CCA-treated wood from insect attack and fungal decay for 50 years when prepared, treated and used in accordance

GENERAL INTRODUCTION Identified in the first half of the nineteenth century, enzymes are extremely proficient catalysts which catalyse synthetic as well as non-synthetic i.e. degradative reactions of organisms. Past few decades have seen swift advances in the field of genetics and protein engineering because of enzymes having great catalytic power, eco-friendly use, requirement of reduced energy, precise mode of action etc. These properties of enzymes and their application in various fields

42. For each of the following mixtures, explain whether it is a solution or a heterogeneous mixture. For the solutions, identify the solute and the solvent. a) Cloudy pond water – heterogeneous mixture, this is because it is cloudy, solute is dirt particles - in the water there is clay and humus. b) Apple juice - is a homogeneous solution, water is the solvent there are organic acids, sugars and gums c) Rain water – is a homogeneous mixture, rainwater is nearly a distilled water. The mixture is

were being tested on throughout the experiment included: 1% glucose solution, 0.3% glucose-1-phosphate, 1% maltose sugar, honey solution, 1% sucrose solution, 1% lactose solution, 1% glycogen solution, 1% starch solution, protein, beer, distilled water and an unknown substance “unknown 193”. The Benedict’s test was intended to check if the twelve chemicals contained any reducing sugars. To test the substances, Benedict’s solution was added to each chemical and then the test tubes were boiled for five

The most of the researches in the past for nanomaterials like CuO, Al¬2o3 and other materials and few in Tio2 and Zro2. Ehsan et al. 2013(1) in their work add copper oxide (CuO) nanoparticles to engine oil and evaluate the produced changes in some of its properties like, viscosity, pour point, and flash point of nanolubricants at different concentrations (0.1, 0.2, and 0.5 wt.%), and also their thermal conductivity

The quality often declines as rivers flow through regions where land and water use are intense and where pollution from industry increases. 1.2.1 Water Hardness Water hardness is typically known as the amount of minerals present in an aqueous solution. It specifically looks at the amounts of dissolved calcium and magnesium in the water. Hard water generally has high levels of dissolved minerals whilst soft water has low levels. According to South East Water, the general guidelines classifications