Question

write an experiment of electrolysis of water.​

Answer 1

Answer:

Pre­cau­tions

Wear pro­tec­tive gloves and glass­es. Ob­serve safe­ty rules with sharp ob­jects and elec­tric­i­ty.

Equip­ment:

1. 20% sodi­um sul­fate so­lu­tion;

2. 1% lit­mus so­lu­tion;

3. 3 beakers;

4. 2 clamps;

5. source of di­rect cur­rent (for ex­am­ple a bat­tery);

6. pen­cil;

7. sta­tionery knife;

8. piece of pa­per to fit in the beaker.

Step-by-step in­struc­tions

Pre­pare the elec­trode: With the sta­tion­ary knife, cut the pen­cil in half and re­move the graphite rod. Cut it into two pieces and con­nect to the clamps.

Pour the sodi­um sul­fate so­lu­tion and lit­mus so­lu­tion into a beaker. The col­or of lit­mus in the sodi­um sul­fate so­lu­tion is pur­ple. Low­er a piece of pa­per into the beaker with the so­lu­tion to sep­a­rate the space be­tween elec­trodes. Then low­er the pre­pared elec­trodes into the beaker, which are con­nect­ed to a source of di­rect cur­rent, for ex­am­ple a bat­tery. Ob­serve the re­lease of gas­es on the elec­trodes and the change of col­or in the elec­trode spa­ces.

Na₂­SO₄↔2Na⁺+SO₄²⁻

Cath­ode(-): 2H₂O + 2e = H₂ + 2OH⁻

An­ode(+): 2H₂O — 4e = O₂ + 4H⁺

Thus, we may con­clude that the elec­trol­y­sis of wa­ter is tak­ing place:

2H₂O (elec­trol­y­sis) → 2H₂ + O₂

Answer 2

$\tt \red { \pmb{\: \underline{To \: Demonstrate \: The \: Electrolysis \: of \: Water}}} : -$

$\bf \: { \pmb{ \colorbox{lavender}{ \blue{Material \: Required}}}} : -$

• One Battery of 9V
• Two Graphite Pencils
• One Beaker
• Tap Water
• Connecting Wires and tape

$\bf \: { \pmb{ \colorbox{lavender}{ \blue{Procedure }}}} : -$

• Sharpen both ends of both the pencils.
• Fill the beaker with tap water. Make sure that the contact with the Graphite in the pencils is perfect
• Secure the wires with tape.
• Use a piece of Cardboard to hold the pencils in a vertical position.
• Place the exposed tips of the pencils in the water,such that tips are fully submerged but aren't touching the bottom.
• The pencil is being used as ELECTRODE here. Now, Wait for 3-4 minutes and observe carefully.

$\bf \: { \pmb{ \colorbox{lavender}{ \blue{Observation }}}} : -$

• Small Gas Bubbles will formed near the electrodes.
• The change takes place in the tap water is the Chemical Change.