form3/4 chem

(a)
(i) magnesium + oxygen → magnesium oxide
(ii) A white solid is formed.

(b)
(i) sodium + water → sodium hydroxide + hydrogen
(ii) They react vigorously and sodium dissolves in water to form a colourlesssolution.

(c)
(i) zinc + steam → zinc oxide + hydroxide
(ii) A white solid is formed.

(d)
(i) calcium + hydrochloric acid → calcium chloride + hydrogen
(ii) Colourless bubbles are formed.

(e)
(i) carbon + copper(II) oxide → copper + carbon dioxide
(ii) A reddish brown solid is formed.