Water can be tested for purity using boiling point and melting point measurements. Distilled water is used in chemistry experiments rather than tap water because distillation removes impurities like minerals, microbes, and fertilizer compounds that could interfere with reactions. Common water treatment methods include sedimentation to remove particles, chlorination to disinfect, carbon filtration to remove odors, and multi-stage filtration to remove dissolved and suspended contaminants. Fertilizers provide essential nutrients like nitrogen, phosphorus, and potassium to promote plant growth.
Water can be tested for purity using boiling point and melting point measurements. Distilled water is used in chemistry experiments rather than tap water because distillation removes impurities like minerals, microbes, and fertilizer compounds that could interfere with reactions. Common water treatment methods include sedimentation to remove particles, chlorination to disinfect, carbon filtration to remove odors, and multi-stage filtration to remove dissolved and suspended contaminants. Fertilizers provide essential nutrients like nitrogen, phosphorus, and potassium to promote plant growth.
Water can be tested for purity using boiling point and melting point measurements. Distilled water is used in chemistry experiments rather than tap water because distillation removes impurities like minerals, microbes, and fertilizer compounds that could interfere with reactions. Common water treatment methods include sedimentation to remove particles, chlorination to disinfect, carbon filtration to remove odors, and multi-stage filtration to remove dissolved and suspended contaminants. Fertilizers provide essential nutrients like nitrogen, phosphorus, and potassium to promote plant growth.
Water can be tested for purity using boiling point and melting point measurements. Distilled water is used in chemistry experiments rather than tap water because distillation removes impurities like minerals, microbes, and fertilizer compounds that could interfere with reactions. Common water treatment methods include sedimentation to remove particles, chlorination to disinfect, carbon filtration to remove odors, and multi-stage filtration to remove dissolved and suspended contaminants. Fertilizers provide essential nutrients like nitrogen, phosphorus, and potassium to promote plant growth.
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Water And Fertilizers
By: Manal Kashif
IX-CC How to test the presence of water using anhydrous cobalt(II) chloride ? • Cobalt(II) chloride turns blue to pink on the addition of water. This test is usually done using cobalt chloride paper • The equation is : anhydrous cobalt(II) chloride + water hydrated cobalt(II) chloride CoCl2 (s) + 6H2O (l) CoCl2.6H2O (s) How to test the presence of water using anhydrous copper(II) sulfate? • Anhydrous copper(II) sulfate turns from white to blue on the addition of water • The equation is: • CuSO4 (s) + 5H2O (l) → CuSO4.5H2O (s) Describe how to test for the purity of water using melting point and boiling point • A physical test to see if a sample of water is pure is to check its boiling point • A sample of the liquid is placed in a suitable container such as a boiling tube and gently heated • Using a thermometer, you can check if the boiling point is exactly 100 oC • Any impurities present will usually tend to raise the boiling point and depress the melting point of pure substance Why is distilled water is used in practical chemistry rather than tap water? • . Distilled water is basically inert, meaning nothing is in the water but hydrogen and oxygen. Distillation kills most organic matter and removes minerals from the water, making it an ideal control element for science projects and laboratory tests. Note:- • Water from natural sources contain (a) dissolved oxygen (b) metal compounds (c) plastics (d) sewage (e) harmful microbes (f) nitrates from fertilizers (g) phosphates from fertilizers and detergents. • Some of which are beneficial such as dissolved oxygen is essential for aquatic life some metal compounds in water provide essential minerals for life , which are essential for a healthy human body. • Some of these substances are potentially harmful ,such as toxic metal compounds which turn the water acidic and undrinkable , plastics which harm aquatic life , sewage that contains harmful microbes which cause diseases such as dengue and pneumonia some nitrates and phosphates that lead to deoxygenation of water and damage to aquatic life. treatment of the domestic water supply 1. Sedimentation : It is the process of separating small particles , solids and sediments in water . This process happens naturally when water is still because gravity will pull the heavier sediments down to form a sludge layer. It is used to reduce amount of coagulation or concentration of particles. 2. Carbon in form of charcoal is added to remove tastes and odors in water. Activated carbon filters are used to remove unwanted tastes, odors, radon, and some man-made volatile organic contaminants from drinking water. 3. Chlorination : is the process of adding chloramine to drinking water to disinfect it and kill germs. The particular type of chloramine used in drinking water disinfection is called monochloramine which is mixed into water at levels that kill germs but are still safe to drink. 4. Filtration : During filtration, the clear water passes through filters that have different pore sizes and are made of different materials (such as sand, gravel, and charcoal). These filters remove dissolved particles and germs, such as dust, chemicals, parasites, bacteria, and viruses. Fertilizers • Ammonium salts are sources of soluble nitrogen, so they can be used as ‘nitrogenous’ fertilizers. They are manufactured on an industrial scale, but they can also be made in the laboratory on a smaller scale. Ammonium nitrate , NH4NO3, and ammonium sulfate, (NH4)2SO4, are two nitrogenous fertilizers. • The letters "NPK" on a fertilizer label stand for nitrogen, phosphorus, and potassium, the three primary nutrients plants need to grow. These fertilizers contain nitrogen, phosphorus and potassium compounds to promote plant growth.