Question

Take water in 4 different beakers and add a small piece of sodium, lead, iron and copper in each. 

a. In which all solutions gas bubbles will be formed? Which gas is formed? 

b. Which solution will turn pink on adding phenolphthalein? Why? 

c. Write the chemical equation between this metal and water.

Answer 1

a. Gas bubbles are formed in the beaker containing sodium. Hydrogen is tlie gas formed. 

b. Beaker containing sodium turns pink because sodium reacts with water and forms an alkali, sodium hydroxide. Alkalies turn phenolphthalein pink.

c. 2Na (s) + 2H₂O (l) → 2NaOH (aq) + H₂ (g)