Chemistry Reactions and Oxidation

To prevent the formation of magnesium oxide.

To ensure faster reaction by removing impurities. (correct)

To allow more air to enter the ribbon.

To reduce the temperature of the magnesium ribbon.

Na + H_2O → NaOH + H_2

2Na + 2H_2O → NaOH + H_2

Na + 2H_2O → 2NaOH + H_2

2Na + H_2O → 2NaOH + H_2 (correct)

Copper reacts with oxygen from the air.

Copper ions are reduced by hydrogen.

Iron displaces copper due to its higher reactivity. (correct)

Iron becomes oxidized to form FeSO_4.

<p>Hydrogen</p> Signup and view all the answers

<p>Calcium hydroxide</p> Signup and view all the answers