Chemistry
(a) Give balanced equation for the following.
(1) Sodium hydroxide is added to hydrogen chloride.
(2) Sodium aluminate is treated with water.
(b) If the valency of an element is 2, then to which group will this element belong to?
Acids Bases Salts
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Answer
(a) Balanced equations:
- NaOH + HCl ⟶ NaCl + H2O
- NaAlO2 + 2H2O ⟶ NaOH + Al(OH)3
(b) Group 2
Reason — The number of valence electrons determine the group of the element. Hence, the element belongs to group 2 as it has 2 electrons in the valence shell.s
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