a) Name two metals which react violently with cold water.
b) Write any one observation you would make when such a metal is dropped into water. c) How would you test the gas evolved, if any, during the reactions?
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Answer:
a) Sodium and potassium metals react violently with cold water.
b) Metals which react violently with cold water are potassium (K) and sodium (Na).
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The hydrogen gas produced during the reactions of these two metals with water immediately catches fire. Thus, these reactions are violent and exothermic.
The gas evolved during these reactions burns with a popping sound w hich confirms that the gas is hydrogen (H2).
Explanation:
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Answer:
a) K (Potassium) and Na (Sodium)
b) It appears to catch fire and hydrogen gas is formed.
c) The gas involved will be hydrogen. Bubbles will de formed with a sound giving us an indication of Hydrogen.
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