Question
(vi) CaCO_(3)(s)arrow CaO(s)+CO_(2)(g) SECTION B (54 Marks) Answer all questions in this section 3. Using a schematic diagram, illustrate the correct sequence of urban water treatment. 4. (a) Briefly explain the importance of a laboratory coat safety goggles, gloves and protective masks as safety equipment in the Chemistry laboratory. (b) Identify the uses of the given apparatuses: (i) Reagent bottle (ii) Filter funnel Page 4 of 6 Displacement reaction remem H Decomposition reacti
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Jocelyn
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3. The correct sequence of urban water treatment is as follows:- Coagulation and flocculation: This step involves adding chemicals to the water to remove dirt and other suspended particles. The particles clump together and form larger particles called flocs.- Sedimentation: The water is allowed to sit still, which causes the flocs to settle at the bottom of the tank.- Filtration: The water passes through a filter, which removes the flocs and other large particles.- Disinfection: Chlorine or other disinfectants are added to the water to kill any bacteria or other microorganisms that could cause illness.- pH adjustment: The pH of the water may be adjusted to make it more acidic or more basic, depending on the desired properties of the water.- Additional treatment: Depending on the specific needs of the water, additional treatment steps may be added, such as ion exchange or reverse osmosis.4. (a) Laboratory coat, safety goggles, gloves, and protective masks are all important safety equipment in a chemistry laboratory for the following reasons:- Laboratory coat: A laboratory coat protects the wearer's clothing from spills, splashes, and other chemical hazards. It also helps to prevent the wearer from coming into direct contact with chemicals.- Safety goggles: Safety goggles protect the eyes from chemical splashes, flying particles, and other hazards. They also help to prevent chemical fumes from entering the eyes.- Gloves: Gloves protect the hands from chemical spills, splashes, and other hazards. They also help to prevent the wearer from coming into direct contact with chemicals.- Protective masks: Protective masks help to protect the respiratory system from chemical fumes, vapors, and other airborne hazards. They also help to prevent the wearer from inhaling harmful particles or gases.(b) (i) Reagent bottle: A reagent bottle is used to store and mix chemicals in a chemistry laboratory. It is typically made of glass or plastic and has a tight-fitting lid to prevent spills and leaks.(ii) Filter funnel: A filter funnel is used to separate solid particles from a liquid in a chemistry laboratory. It consists of a funnel-shaped device with a porous bottom that allows the liquid to pass through while trapping the solid particles.