Q14 of 152 Page 18

Write complete balanced equations for the following reactions:

(a) Calcium (solid) +Water (liquid) Calcium hydroxide (solution) +Hydrogen (gas)


(b) Sulphur dioxide (gas)+ Oxygen (gas)Sulphur trioxide (gas)

(a) Ca (s) + 2H20 (l) Ca(OH)2 (aq) + H2 (g)


Calcium will react with 2 moles of water.


(b) 2S02 (g) + 02 (g) 2S03 (g)


2 moles of Sulphur dioxide and oxygen to give 2 moles of Sulphur trioxide.



More from this chapter

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12 Complete and balance the following equations:

(a) NaOH +....... Na2S04 + H20


(b) Ca(OH)2 +.... CaC03 + H20

 13 Correct and balance the following equations:

(i) Ca + H20 CaOH + H


(ii) N + H NH3

 15 Balance the following equations:

(i) Na + 02 Na20


(ii) H202H20 + 02


(iii) Mg(OH)2 +HCl MgCl2+ H20


(iv) Fe +02Fe203


(v) Al(OH)3Al203 + H20


(vi) NH3 + CuO Cu +N2+ H20


(vii) Al2(S04)3 + NaOH Al(OH)3 + Na2S04


(viii) HN03 +Ca(OH)2Ca(NO3)2 + H2O


(ix) NaOH+H2S04Na2SO4 +H2O


(x) BaCl2+H2S04 BaSO4+ HCl

 16 Fill in the following blanks with suitable words:

(a) Chemical equations are balanced to satisfy the law of ........


(b) A solution made in water is known as an ............ solution and indicated by the symbol ..............