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Periodic Classification Of Elements

Question
CBSEENSC10010567
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Write and balance the following equations presented to you as written statements:

(i) Magnesium carbonate plus hydrochloric acid produces magnesium chloride plus water plus carbon dioxide gas.
(ii)    Aluminium plus chlorine gas produces aluminium trichloride.
(iii)    Nitrogen plus hydrogen produces ammonia.
(iv)    Calcium plus sulphur produces calcium sulphide.
(v)    Magnesium burns in CO2 to form magnesium oxide and carbon.

Solution

Following reaction can be balance in step by step method:

(i)    
MgCO3 + HCl → MgCl2 + H2O + CO2
MgCO3 + 2HCl → MgCl2 + H2O + CO2

(ii)   
Al + Cl2  → AlCl3
Al + 3Cl2 → 2AlCl3
2Al + 3Cl2→ 2AlCl3

(iii)   
N2 + H2 → NH3
N2 + H2 → 2NH3
N2 + 3H2 → 2NH3

(iv)    Ca + S → CaS

(v)    
Mg + CO2 → MgO + C
Mg + CO2 → 2MgO + C
2Mg + CO2 → 2MgO + C.

Some More Questions From Periodic Classification of Elements Chapter

Balance the following skeleton equations:
(i)    KClO3 →KCl + O2
(ii)    Na2CO3 + HCl → NaCl + H2O + CO2
(iii)    CH4 + O2 → CO2 + H2O
(iv)    NaCl + H2SO4 → Na2SO4 + HCl
(v)    Fe + H2O → Fe3O4 + H2
(vi)    H2S + O2 → H2O + S
(vii)    H2 + N2 →NH3.

Balance the following chemical equations:
(i)    NaOH + H2SO4 → Na2SO4 + H2O
(ii)    HNO3 + Ca(OH)2 → Ca(N03)2 + H2 O
(iii)    FeCl2 + H2S → HCl + FeS 

What does a balanced chemical equation convey to a chemist?

list the limitations of chemical equation.

What are the essentials of a chemical equation?

What information is available from the following equation:
CaCO3 + 2HCl→ CaCl2 + H2O+ CO2

What is a thermochemical equation? Give two examples.

Write and balance the following equations presented to you as written statements:

(i) Magnesium carbonate plus hydrochloric acid produces magnesium chloride plus water plus carbon dioxide gas.
(ii)    Aluminium plus chlorine gas produces aluminium trichloride.
(iii)    Nitrogen plus hydrogen produces ammonia.
(iv)    Calcium plus sulphur produces calcium sulphide.
(v)    Magnesium burns in CO2 to form magnesium oxide and carbon.

H2 + O → H2O is a balanced chemical equation. It is considered to be incorrect. Why?

Complete and balance the following equations:

(i)    NaOH +................→ Na2SO4 + H2O

(ii)    Ca(OH)2 +................ → CaCO3 + H2O

(iii)    ................ + HCl(aq) → MgCl2(aq) +.................

(iv)    ................ + Na2SO4(aq) → BaSO4(s) + NaCl(aq)

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