increasing the available surface area for the digestion stage. Lime and "spent liquor" (caustic soda returned from the precipitation stage) are added at the mills to make pumpable slurry. 2. Desilication Bauxites that have high levels of silica (SiO2) go through a process to remove this impurity. Silica can cause problems with scale formation and quality of the final product. 3. Digestion A hot caustic soda (NaOH) solution is used to dissolve the aluminium-bearing minerals in the bauxite (gibbsite
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The argument as to whether or not schools should be able to sell junk food is a highly controversial topic. To begin with‚ there is the problem to defining junk foods. Are we talking about potato chips‚ soda‚ and Twinkies? What about fried chicken fingers‚ cheeseburgers‚ and pizza-foods many schools serve? Most cases‚ when faced with the decision‚ a child will no doubt choose what is offered without knowing it is a health issue. What would a change in the availability of these snacks teach children
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epi‚ croissant‚ and brioche. French bread has a soft‚ chewy center and crispy crust. In addition‚ soda bread‚ popular type of bread in Europe‚ originated from Ireland. The first soda bread showed in the middle of the 19th century. In the U.S.‚ soda bread was first publicized by Amelia Simmons. The most popular soda breads are Irish brown soda bread and whole wheat soda bread. The traditional soda bread has a dry and international favorite. On the other hand‚ Asia has different kinds bread. Bing
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prevention and treatment. The impact of this research will allow us to better educate our society as 37% of kids in the United States‚ between the age of 11 and 13‚ suffer from enamel erosion. Hypothesis If egg shells are soaked in tea‚ coffee‚ soda and fruit juice ‚ then coke should cause more stain damage because it has the most sugar.
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Chemistry vacation Assignment Standard -X 1. Name a sodium compound which is used for softening hard water 2. Write the chemical name and formula of baking soda? 3. What will happen if the solution of sodium hydrogen carbonate is heated? Give the equations of the reaction involved? 4. Write the chemical name and the formula of bleaching powder. 5. Write the chemical formula of plaster of Paris? 6. What will happen if heating is not controlled while preparing
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Question 1: During the 1990s‚ technological advance reduced the cost of computer chips. Explain‚ with the use supply and demand diagrams‚ how the following markets are affected in terms of prices and quantities. a) Computers b) Computer software c) Typewriters a) DEMAND- Demand refers to how much (quantity) of a product or service is desired by buyers. The quantity demanded is the amount of a product people are willing to buy at a certain price; the relationship between price and quantity
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quantities. (a) Computers (3 marks) (b) Computer software (3 marks) (c) Typewriters (3 marks) Question 2 (6 marks) After an economics lecture one day‚ your friend suggests that taxing food would be a good way to raise revenue because the demand for food is quite inelastic. (a) In what sense is taxing food is a ‘good’ way to raise revenue? (3 Marks) (b) In what sense is it not a ‘good’ way to raise revenue? (3 Marks) Question 3 (5 marks) Most studies of firms’ long run costs
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producing goods and services‚ such as infrastructure‚ education‚ and national defense. In addition‚ transferring income‚ both vertically across income levels and horizontally among groups with similar incomes and different characteristics. Lastly‚ taxing to pay for outlays‚ which can lower economic efficiency by distorting behavior. The nature of industrial policies is that they complement—opponents would say “distort”—market forces: they reinforce or counteract the allocative effects that the existing
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You wouldn’t eat 22 packs of sugar in a day‚ so why are you eating so much sugary foods? Sugar can give you diseases‚ added sugar can cause liver problems‚ and soda is trying to kill you! If you too much sugar; it can kill you. So stop eating so much sugar‚ it is the opposite of what healthy means to you. Although sugar is sweet‚ it can be deadly. Sugar can give you a lot of diseases; like Type 2 Diabetes which is caused by Insulin Resistance. Scientists have proven; sugar can cause cancer. The
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acidic than a liquid with a pH of 4‚ therefore a liquid with a pH of 3 is stronger. Look at the ingredients for each liquid you tested. Which ingredients contribute to each of the liquid’s pH? Sprite: Citric Acid Apple Juice: Ascorbic Acid Baking Soda: Sodium Bicarbonate Shampoo: Citric Acid Conditioner: Sodium Carbonate Neutralization: Whenever you mix an acid with a base‚ they neutralize each other. If this is the case‚ why is Alka-Seltzer used to treat stomach
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