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Displacement reaction
1) Displacement reactions can be classified as metal-metal displacement reactions or metal-nonmetal displacement reactions. 2) In metal-metal displacement reactions, more reactive metals displace less reactive metals according to the reactivity series. For example, copper displaces iron when an iron bar is placed in copper sulfate solution. 3) In metal-nonmetal displacement reactions, metals can displace hydrogen from water, with more reactive metals like sodium displacing hydrogen even at room temperature, while less reactive metals like iron only displacing hydrogen when heated.
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Displacement reaction
- 1. CBSE - 10 Chemical Reactions and Equations Chemistry Types of Chemical Reactions Displacement Reaction We can classify displacement reactions further into metal- metal displacement and metal-nonmetal displacement Displacement Reaction reactions. Metal-metal Metal - non-metal Subtopic ID: 01.03.03
- 2. CBSE - 10 Chemical Reactions and Equations Chemistry Types of Chemical Reactions Displacement Reaction According to reactivity series the most reactive metals Metal – Metal Displacement replace the less reactive metals. Subtopic ID: 01.03.03
- 3. CBSE - 10 Chemical Reactions and Equations Chemistry Types of Chemical Reactions Displacement Reaction When we dip iron bar in Metal – Metal Displacement copper sulphate solution copper displaces iron and hence it appears brownish. This is a very good example of metal-metal displacement reaction. Fe + CuSO4 FeSO4 + Cu Subtopic ID: 01.03.03
- 4. CBSE - 10 Chemical Reactions and Equations Chemistry Types of Chemical Reactions Displacement Reaction Click the view answer button Metal – Metal Displacement to find out the product. Complete the reaction Cu + AgNO3 _____ + _____ View answer Subtopic ID: 01.03.03
- 5. CBSE - 10 Chemical Reactions and Equations Chemistry Types of Chemical Reactions Displacement Reaction Since copper is more reactive than silver copper replaces Metal – Metal Displacement silver in this reaction. Cu + 2AgNO3 2Ag + Cu(NO3)2 Copper coil Silver nitrate solution Silver and copper nitrate solution Subtopic ID: 01.03.03
- 6. CBSE - 10 Chemical Reactions and Equations Chemistry Types of Chemical Reactions Displacement Reaction Sometimes, a metal displaces a non-metal. Different metals Metal – Non-metal Displacement have different reactivities with various non-metals such as 2Na + 2H2O 2NaOH + H2 ↑ oxygen and hydrogen. For example, sodium reacts violently with water, even at room temperature to replace hydrogen, the non-metal. Reaction of sodium with water Subtopic ID: 01.03.03
- 7. CBSE - 10 Chemical Reactions and Equations Chemistry Types of Chemical Reactions Displacement Reaction Hydrogen in water is replaced by magnesium only on Metal – Non-metal Displacement heating. Heat Mg + H2O MgO + H2 ↑ Magnesium powder Magnesium oxide Subtopic ID: 01.03.03
- 8. CBSE - 10 Chemical Reactions and Equations Chemistry Types of Chemical Reactions Displacement Reaction Copper does not react with water. Sodium is more Metal – Non-metal Displacement reactive with water. Thus we Order of reactivity of metals with water can predict the non-metal displacement by the order of reactivity. Na > Mg > Fe > Cu Reaction of sodium with water Subtopic ID: 01.03.03
- 9. CBSE - 10 Chemical Reactions and Equations Chemistry Types of Chemical Reactions Displacement Reaction Click the view answer button Metal – Non-metal Displacement to find out the products. Iron reacts with steam when it is red hot. Complete the equation Fe + H2O Red hot _____ + ______ View answer Subtopic ID: 01.03.03
- 10. CBSE - 10 Chemical Reactions and Equations Chemistry Types of Chemical Reactions Displacement Reaction Iron replaces hydrogen from Metal – Non-metal Displacement water. Red hot 3Fe + 4H2O Fe3O4 + 4H2 ↑ Subtopic ID: 01.03.03
- 11. CBSE - 10 Chemical Reactions and Equations Chemistry Types of Chemical Reactions Displacement Reaction Two compounds react to form Double Displacement different compounds by mutual exchange of ions or atoms in a double displacement reaction. Double Displacement Mutual exchange of ions in two different compounds Subtopic ID: 01.03.03
- 12. CBSE - 10 Chemical Reactions and Equations Chemistry Types of Chemical Reactions Displacement Reaction When silver nitrate reacts Double Displacement with potassium chloride, it gives silver chloride and potassium nitrate. AgNO3 + KCl AgCl + KNO3 Silver nitrate solution Silver chloride solution (Colourless) (Curdy white precipitate) Subtopic ID: 01.03.03
- 13. CBSE - 10 Chemical Reactions and Equations Chemistry Types of Chemical Reactions Displacement Reaction Click the view answer button Double Displacement to find out the product. What happens when barium chloride is treated with sodium sulphate? View answer Subtopic ID: 01.03.03
- 14. CBSE - 10 Chemical Reactions and Equations Chemistry Types of Chemical Reactions Displacement Reaction Double Displacement Barium chloride gives a white precipitate of barium sulphate and BaCl2 + Na2SO4 BaSO4 ↓ + 2NaCl sodium chloride. Subtopic ID: 01.03.03
- 15. CBSE - 10 Chemical Reactions and Equations Chemistry Types of Chemical Reactions Displacement Reaction Neutralisation is also an example of double Neutralisation displacement reaction. Acid reacts with base to form salt and water. Neutralisation Acid + Base Salt + Water Subtopic ID: 01.03.03
- 16. CBSE - 10 Chemical Reactions and Equations Chemistry Types of Chemical Reactions Displacement Reaction Equimolar mixture of sodium hydroxide and hydrochloric Neutralisation Neutralisation acid result neutralisation NaOH + HCl NaCl + H2O mixture, containing sodium chloride salt and water . When we add a few drops of phenolphthalein indicator to the neutralisation mixture with a slight excess of alkali it give a pale pink colour. Pale pink colour of neutralisation Colourless neturalisation mixture with slight excess of mixture NaOH Subtopic ID: 01.03.03
- 17. CBSE - 10 Chemical Reactions and Equations Chemistry Types of Chemical Reactions Displacement Reaction Click the view answer button Neutralisation to find out the product. Complete the reaction Ca(OH)2 + H2SO4 ____ + ___ View answer Subtopic ID: 01.03.03
- 18. CBSE - 10 Chemical Reactions and Equations Chemistry Types of Chemical Reactions Displacement Reaction Calcium hydroxide reacts with Neutralisation sulphuric acid to form calcium sulphate and water. Ca(OH)2 + H2SO4 CaSO4↓ +2H2O Calcium hydroxide Calcium sulphate Sulphuric acid Subtopic ID: 01.03.03