Water purification is the process of removing undesirable chemicals‚ biological contaminants‚ suspended solids and gases from contaminated water. The goal is to produce water fit for a specific purpose. Most water is purified for human consumption (drinking water)‚ but water purification may also be designed for a variety of other purposes‚ including meeting the requirements of medical‚ pharmacological‚ chemical and industrial applications. In general the methods used include physical processes such
Premium Water Water purification Drinking water
Worked solutions to student book questions Chapter 4 Analysing acids and bases Q1. Antacid tablets should normally be chewed before they are swallowed. Why? A1. Antacid tablets are normally chewed to provide a larger surface area for faster reaction with stomach acids. Q2. A laboratory test to determine how much hydrochloric acid is neutralised by a brand of antacid does not give a complete picture of its effectiveness in the stomach. What other factors might be important? A2. Other factors to
Premium Sodium hydroxide Hydrochloric acid PH
Task Two: Nutrients‚ energy and requirements (P2‚ M1) Knowledge of the sources and functions of different nutrients is essential to understanding the relationship between food and health. Create a handout for your peers‚ that describes the characteristics of nutrients and their benefits to the body (P2). Create a second handout that discusses the similarities and differences in the nutritional and energy requirements of two groups of individuals (M1). Protein Proteins are key components
Free Nutrition
Name ( ( Class ( ( Title ( Manufactured Substances in Industry ( |Content |Page | |(A) Sulphuric acid | | |Manufacture of sulphuric acid |1 – 3 | |Properties of sulphuric acid
Premium Ammonia Sulfuric acid
Chemicals in Food Chemicals are added to food for (i) their preservation‚ (ii) enhancing their appeal‚ and (iii) adding nutritive value in them. Main categories of food additives are as follows: (i) Food colours (ii) Flavours and sweeteners (iii) Fat emulsifiers and stabilising agents (iv) Flour improvers – antistaling agents and bleaches (v) Antioxidants (vi) Preservatives (vii) Nutritional supplements such as minerals‚ vitamins and amino acids. Except for chemicals of category (vii)‚ none
Premium Sodium hydroxide Soap Sodium
through limewater‚ it becomes hazy. After a couple more breaths‚ the limewater becomes cloudy then becomes cloudy white as milk. Our breath contains carbon dioxide‚ and when it reacts with the limewater which contains Ca(OH)2 calcium hydroxide‚ it produces a new substance‚ CaCO3 calcium carbonate. 4. Write the equation(s) for the reaction that occur when the breath is blown through limewater. CO2(g) + Ca(OH)2(aq) CaCO3(s) + H2O(l) 5. Complete and balance the following (assume that complete oxidation occurs)
Free Carbon dioxide Oxygen
diazotised sulphanilic acid with N‚N-dimethylaniline. Materials (Chemicals) Sulfanilic acid‚ 2.5% aqueous sodium carbonate solution‚ sodium nitrite‚ concentrated hydrochloric acid‚ N‚N-dimethylaniline‚ glacial acetic acid‚ 10% aqueous sodium hydroxide‚ saturated sodium chloride solution Apparatus 50 mL Erlemeyer flask‚ 250 mL beaker‚ test tube‚ hot plate‚ Buchner funnels Procedure In a 50 mL Elermenyer flask 1.2 g of sulfanilic acid and 12.5 mL of 2.5% aqueous sodium carbonate solution was
Premium Sodium chloride Chlorine Hydrochloric acid
An Assignment on Rice Bran Oil Technology Oil: Oils are esters of glycerol and fatty acid. In other words‚ oils are tri-glycerol ester of fatty acid. Hence ester of glycerol is known as glycerides and fatty acids both are saturated and unsaturated. Oils are liquid at ordinary temperature. Example: Rice bran oil‚ Coconut oil‚ Soybean oil‚ palm oil. Etc. Fats: Fats are same as oil‚ i.e. Fats are esters of glycerol and fatty acid‚ except that fat is solid at ordinary temperature. The melting point
Premium Fatty acid Linoleic acid
Introduction Nutrients are the substances that provide nourishments to the body for it to grow strong and maintain life. Carbohydrates (CHO) Carbohydrates are made of carbon‚ hydrogen‚ and oxygen. Carbohydrates are macro-nutrient that provides energy for the body; the energy gives our cell which helps our oxygen and nutrients to function when we sleep. 1. Different Types There are two types of carbohydrates‚ the simple and complex carbohydrates. Simple carbohydrates These are made up
Premium Nutrition Glucose Vitamin
using a grinding machine. Water is added to make a fine particles or a mush of the ore. Then the particles or mush is combined with potassium cyanide or other kind of cyanide. To prevent the toxic hydrogen cyanide during the process‚ calcium hydroxide or sodium hydroxide is often added to maintain the solution to strongly basic. The method of using cyanide instead liquid mercury was developed at Scotland in 1887. The process was first used on the Rand in 1890 and‚ It tons of investment for larger gold
Premium Potassium Sodium hydroxide Metal