Sodium Reactions with Water Concepts

The video explains the explosive reaction of sodium metal with water, contrasting it with the non-reactive nature of sodium chloride. It highlights the role of electron arrangement in sodium's reactivity, emphasizing the difference between neutral sodium atoms and sodium ions. The video also details the chemical process when sodium metal reacts with water, releasing energy and hydrogen gas, leading to an explosion.

What happens when a chunk of sodium metal is placed in water?

• It dissolves slowly.

• It reacts explosively.

• It changes color.

• It remains unchanged.

Why doesn't table salt react explosively with water like sodium metal?

• Table salt contains sodium ions, not neutral sodium atoms.

• Table salt is too small to react.

• Table salt is already dissolved in water.

• Table salt is not made of sodium.

What is the charge of sodium atoms in sodium metal?

• Neutral

• Positive

• Negative

• Variable

How many electrons do sodium ions in sodium chloride have?

• 11

• 10

• 12

• 9

What makes sodium metal atoms so reactive?

• They lack protons.

• They have one electron in their outermost energy level.

• They are negatively charged.

• They have a full outer energy level.

What happens to the outer electron of sodium metal when it reacts with water?

• It is transferred to water.

• It is lost to the air.

• It remains with the sodium atom.

• It is absorbed by the sodium atom.

What gas is released during the reaction of sodium metal with water?

• Nitrogen

• Hydrogen

• Oxygen

• Carbon dioxide

Why is hydrogen gas produced in the reaction of sodium metal with water considered dangerous?

• It is toxic.

• It is highly flammable.

• It is corrosive.

• It is radioactive.

What is the main reason sodium chloride does not react violently with water?

• It is not soluble in water.

• It is already in a stable ionic form.

• It is too dense.

• It lacks sodium.

What is the role of water in the reaction with sodium metal?

• It acts as a catalyst.

• It absorbs the sodium atoms.

• It accepts electrons from sodium.

• It prevents the reaction.