(a) 2KBr(aq)+BaCl₂→2Kl(aq)+BaBr₃(s) It is a double displacement reaction. (b) ZnCO₃(s)→ZnO(s)+CO₂(g) It is a decomposition reaction. (c) H₂(g)+Cl₂→2HCl(g) It is a combination reaction. (d) Mg(s)+2HCl(aq)→MgCl₂+H₂(g) It is a displacement reaction.
(a) 2KBr(aq)+BaCl₂→2Kl(aq)+BaBr₃(s)
It is a double displacement reaction.
(b) ZnCO₃(s)→ZnO(s)+CO₂(g)
It is a decomposition reaction.
(c) H₂(g)+Cl₂→2HCl(g)
It is a combination reaction.
(d) Mg(s)+2HCl(aq)→MgCl₂+H₂(g)
It is a displacement reaction.
When the number of atoms of reactants is equal to the number of atoms of the products, the reaction is called a balanced chemical equation. According to the Law of conservation of mass, total mass of the elements present in the reactants must be equal to the total mass of the elements present in proRead more
When the number of atoms of reactants is equal to the number of atoms of the products, the reaction is called a balanced chemical equation. According to the Law of conservation of mass, total mass of the elements present in the reactants must be equal to the total mass of the elements present in products. That’s why a chemical equations should be balanced always.
(i) In this reaction sodium is combined with oxygen, i.e. gains oxygen and hence oxidized. Consequently oxygen is reduced. (ii) In this reaction Hydrogen gains oxygen and forms water, hence it is oxidised. On the other hand copper loses oxygen and hence, reduced.
(i) In this reaction sodium is combined with oxygen, i.e. gains oxygen and hence oxidized. Consequently oxygen is reduced.
(ii) In this reaction Hydrogen gains oxygen and forms water, hence it is oxidised. On the other hand copper loses oxygen and hence, reduced.
Pb(NO₃)₂ + Ki --> KNO₃ When lead nitrate reacts with potassium iodide, potassium nitrate and lead iodide is formed. In this reaction the both the reactants exchanges their irons after reaction. This type of reaction is known as double displacement reaction.
Pb(NO₃)₂ + Ki –> KNO₃
When lead nitrate reacts with potassium iodide, potassium nitrate and lead iodide is formed. In this reaction the both the reactants exchanges their irons after reaction. This type of reaction is known as double displacement reaction.
The colour of copper sulphate solution is blue. When an iron nail is dipped in the solution of copper sulphate, it forms ferrous sulphate solution and copper metal by the displacement of copper from the solution. The colour of ferrous sulphate is green. That’s why the solution becomes green.
The colour of copper sulphate solution is blue. When an iron nail is dipped in the solution of copper sulphate, it forms ferrous sulphate solution and copper metal by the displacement of copper from the solution.
The colour of ferrous sulphate is green. That’s why the solution becomes green.
(i) The chemical name of substance, which is used for white washing is Calcium oxide. Its common name is lime or quick lime. The chemical formula of Calcium Oxide is CaO. (ii) 𝐶𝑎𝑂+𝐻₂𝑂 → 𝐶𝑎(𝑂𝐻)₂ When calcium oxide reacts with water it forms calcium hydroxide. Calcium hydroxide is also known as slakedRead more
(i) The chemical name of substance, which is used for white washing is Calcium oxide. Its common name is lime or quick lime.
The chemical formula of Calcium Oxide is CaO.
(ii) 𝐶𝑎𝑂+𝐻₂𝑂 → 𝐶𝑎(𝑂𝐻)₂
When calcium oxide reacts with water it forms calcium hydroxide. Calcium hydroxide is also known as slaked lime.
Write the balanced chemical equation for the following and identify the type of reaction in each case.
(a) 2KBr(aq)+BaCl₂→2Kl(aq)+BaBr₃(s) It is a double displacement reaction. (b) ZnCO₃(s)→ZnO(s)+CO₂(g) It is a decomposition reaction. (c) H₂(g)+Cl₂→2HCl(g) It is a combination reaction. (d) Mg(s)+2HCl(aq)→MgCl₂+H₂(g) It is a displacement reaction.
(a) 2KBr(aq)+BaCl₂→2Kl(aq)+BaBr₃(s)
See lessIt is a double displacement reaction.
(b) ZnCO₃(s)→ZnO(s)+CO₂(g)
It is a decomposition reaction.
(c) H₂(g)+Cl₂→2HCl(g)
It is a combination reaction.
(d) Mg(s)+2HCl(aq)→MgCl₂+H₂(g)
It is a displacement reaction.
Write the balanced chemical equations for the following reactions.
(a) Ca(OH)₂+CO₂→CaCO₃+H₂O (b) Zn+2AgNO₃→Zn(NO₃)₂+2Ag (c) 2Al+3CuCl₂→2AlCl₃+3Cu (d) BaCl₂+K₂SO4→BaSO₄+2KCl
(a) Ca(OH)₂+CO₂→CaCO₃+H₂O
See less(b) Zn+2AgNO₃→Zn(NO₃)₂+2Ag
(c) 2Al+3CuCl₂→2AlCl₃+3Cu
(d) BaCl₂+K₂SO4→BaSO₄+2KCl
Balance the following chemical equations.
(a) 2HNO₃+Ca(OH)₂→Ca(NO₃)₂+2H₂O (b) 2NaOH+H₂SO4→Na₂SO₄+2H₂O (c) NaCl+AgNO₃→AgCl+NaNO₃ (d) BaCl₂+H₂SO₄→BaSO₄+2HCl
(a) 2HNO₃+Ca(OH)₂→Ca(NO₃)₂+2H₂O
See less(b) 2NaOH+H₂SO4→Na₂SO₄+2H₂O
(c) NaCl+AgNO₃→AgCl+NaNO₃
(d) BaCl₂+H₂SO₄→BaSO₄+2HCl
Translate the following statements into chemical equations and then balance them.
(a) 3H₂+N₂→2NH₃ (b) 2H₂S+3O₂→2H₂O+2SO₂ (c) 3BaCl₂+Al₂(SO₄)₃→2AlCl₃+3BaSO₄ (d) 2K+2H₂O→2KOH+H₂
(a) 3H₂+N₂→2NH₃
(b) 2H₂S+3O₂→2H₂O+2SO₂
(c) 3BaCl₂+Al₂(SO₄)₃→2AlCl₃+3BaSO₄
See less(d) 2K+2H₂O→2KOH+H₂
What is a balanced chemical equation? Why should chemical equations be balanced?
When the number of atoms of reactants is equal to the number of atoms of the products, the reaction is called a balanced chemical equation. According to the Law of conservation of mass, total mass of the elements present in the reactants must be equal to the total mass of the elements present in proRead more
When the number of atoms of reactants is equal to the number of atoms of the products, the reaction is called a balanced chemical equation. According to the Law of conservation of mass, total mass of the elements present in the reactants must be equal to the total mass of the elements present in products. That’s why a chemical equations should be balanced always.
See lessIdentify the substances that are oxidised and the substances that are reduced in the following reactions.
(i) In this reaction sodium is combined with oxygen, i.e. gains oxygen and hence oxidized. Consequently oxygen is reduced. (ii) In this reaction Hydrogen gains oxygen and forms water, hence it is oxidised. On the other hand copper loses oxygen and hence, reduced.
(i) In this reaction sodium is combined with oxygen, i.e. gains oxygen and hence oxidized. Consequently oxygen is reduced.
See less(ii) In this reaction Hydrogen gains oxygen and forms water, hence it is oxidised. On the other hand copper loses oxygen and hence, reduced.
Give an example of a double displacement reaction other than the one given in Activity 1.10.
Pb(NO₃)₂ + Ki --> KNO₃ When lead nitrate reacts with potassium iodide, potassium nitrate and lead iodide is formed. In this reaction the both the reactants exchanges their irons after reaction. This type of reaction is known as double displacement reaction.
Pb(NO₃)₂ + Ki –> KNO₃
When lead nitrate reacts with potassium iodide, potassium nitrate and lead iodide is formed. In this reaction the both the reactants exchanges their irons after reaction. This type of reaction is known as double displacement reaction.
See lessWhy does the colour of copper sulphate solution change when an iron nail is dipped in it?
The colour of copper sulphate solution is blue. When an iron nail is dipped in the solution of copper sulphate, it forms ferrous sulphate solution and copper metal by the displacement of copper from the solution. The colour of ferrous sulphate is green. That’s why the solution becomes green.
The colour of copper sulphate solution is blue. When an iron nail is dipped in the solution of copper sulphate, it forms ferrous sulphate solution and copper metal by the displacement of copper from the solution.
See lessThe colour of ferrous sulphate is green. That’s why the solution becomes green.
A solution of a substance ‘X’ is used for whitewashing.
(i) The chemical name of substance, which is used for white washing is Calcium oxide. Its common name is lime or quick lime. The chemical formula of Calcium Oxide is CaO. (ii) 𝐶𝑎𝑂+𝐻₂𝑂 → 𝐶𝑎(𝑂𝐻)₂ When calcium oxide reacts with water it forms calcium hydroxide. Calcium hydroxide is also known as slakedRead more
(i) The chemical name of substance, which is used for white washing is Calcium oxide. Its common name is lime or quick lime.
The chemical formula of Calcium Oxide is CaO.
(ii) 𝐶𝑎𝑂+𝐻₂𝑂 → 𝐶𝑎(𝑂𝐻)₂
When calcium oxide reacts with water it forms calcium hydroxide. Calcium hydroxide is also known as slaked lime.
See lessWrite a balanced chemical equation with state symbols for the following reactions.
(i) BaCl2(aq)+NaSO4→BaSO4(S)+2NaCl(aq) (ii) NaOH(aq)+HCl(aq)→Nacl(aq)+H2O(l)
(i) BaCl2(aq)+NaSO4→BaSO4(S)+2NaCl(aq)
See less(ii) NaOH(aq)+HCl(aq)→Nacl(aq)+H2O(l)