Multicolor electrolysis

Acid and Base Indicators Electrolysis

Materials
- Petri dish
- Universal indicators
- Beakers
- Battery
- NaCl
- Electrode wires

Procedure
1. 1 mole of NaCl was measured by the digital weight measurement (58.5 grams)
2. the water was prepared in the beaker and the salt was dissolved in it
3. the universal indicator was added into the solution
4. the wires were connected to the battery with both ends connecting to the solution
5. observe and collect data

Questions
1. Why is the universal indicator green when you first add it?
Answer: because the solution was neutral on that time

2. Why can we use the pencils to run a change
Answer: because can be an electrodes that carries electron

3. What is the color at the cathode?
Answer: purple

4. What is the color at the anode?
Answer: yellow

5. What happens when you place the niobium magnet? Why?
Answer: it creates a magnetic field that make the electrons to form a particular shape

6. What is the equation for the electrolysis of water? Without electrons and volts
Answer: H+ + OH- --> H2O

7. Why can we dump the solution down the drain?
Answer: becuase the products were gases