Metal and Water

What are the general products formed when a metal reacts with water?

• Metal oxide and oxygen

• Metal hydroxide and hydrogen

• Metal carbonate and carbon dioxide

• Metal salt and water

Which gas is produced when a metal reacts with water?

(a)  

Which of the following is the correct balanced symbolic equation for the reaction of potassium with water?

• K + H₂O → KOH + H₂

• 2K + 2H₂O → 2KOH + H₂

• K + 2H₂O → K(OH)₂ + H₂

• 2K + H₂O → 2KOH + H₂O

What visible sign indicates that a metal is reacting with water?

• A change in color of the metal

• The formation of a solid precipitate

• The release of hydrogen gas (fizzing)

• An increase in the water's temperature without gas release

Which of the following shows how a gas is observed in these reactions?

• acid

• base

• Bubbles

• air

Which of the following metals reacts fastest with water?

• Magnesium

• Iron

• Lead

• Zinc

Which of the following metals reacts least with water OR very very very slowly reacts with water?

• Magnesium

• Sodium

• lithium

• Iron

Based on the reactivity series presented, which of these metals is the most reactive?

• Zinc

• Magnesium

• Sodium

• Lead