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Periodic Classification Of Elements

Question
CBSEENSC10010569
Wired Faculty App

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)

Solution

(i)    2NaOH + H2SO4 → Na2SO4 + 2H2O

(ii)    Ca(OH)2 + CO2 → CaCO3 + H2O

(iii)    Mg + 2HCl(aq) → MgCl2(ag) + H2 (g)

(iv)   BaCl2(aq) + Na2SO4(aq) → BaSO4(s) + 2NaCl(aq)

Some More Questions From Periodic Classification of Elements Chapter

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)

What are the drawbacks for a chemical equation? Illustrate with an example.

While writing the chemical reaction for the oxidation of calcium in oxygen, a student wrote the following balanced equation:

Ca + O→ CaO
Is it correct? If not, explain and write the correct balanced equation.

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