Question

by what means water can be decomposed​

Answer 1

Answer:

water can be decomposed by passing electricity through it

Answer 2

Answer:

Electrolysis

Explanation:

A considerable amount of energy is needed to get the atoms apart from each other. A battery can supply power. The water connects these terminals and acts as a bridge for energy flow. Read more about the types of batteries before moving to the next section of the experiment.

Baking soda is added in this experiment to make it as an electrolyte. An electrolyte is a kind of solution which can be split by electrolysis. Electro refers to electricity and energy and lysis denotes splitting.

Apparatus Required

Distilled Water

Two thumbtacks

9V Battery

Small plastic container

Tap water

Stopwatch

2 test tubes

Sodium bicarbonate

Lemon

Salt (table salt)

Detergent (dish wash detergent)

Procedure

Step 1: Put the thumbtacks at the bottom of the container such that the points can be pushed up in the container. Keep the space between them same as the terminals of the battery.

Step 2: Keep the container over the battery terminals with the thumbtacks.

Step 3: Fill the container with distilled water slowly.

Step 4: Put a pinch of Sodium bicarbonate.

Step 5: Hold the test tubes over every pin to collect the gas and note your observations.

Step 6: Remove the solution and repeat the above procedure with different sets that include:

Distilled water and salt.

Distilled water and detergent.

Distilled water and lemon juice.

Only distilled water.

Only tap water.

Electrolysis of water equation:

Reduction (cathode): 2 H+(aq) + 2e− → H2(g)

Oxidation (anode): 2 H2O(l) → O2(g) + 4 H+(aq) + 4e−

This half reaction can also be balanced with a base:

Cathode (reduction): 2 H2O(l) + 2e−→ H2(g) + 2 OH−(aq)

Anode (oxidation): 2 OH−(aq) → 1/2 O2(g) + H2O(l) + 2 e−

Therefore, the overall reaction becomes:

2 H2O(l) → 2 H2(g) + O2(g)

Conclusion

The baking soda solution provides the right amount of electricity, and the settlement with salt gives the best electrolysis.

When baking soda dissolves in water, it allows current between the terminals through the water. The baking soda solution produces hydrogen (H2), carbon dioxide (CO2) and oxygen (O2) gases.