Electrolysis of solutions

When NaCl solution is electrolysed what has forms at the anode?

• Hydrogen
• Oxygen
• Chlorine
• Sodium

What does the Cathode (-) do to ions?

• Give electrons to the Positive ions to turn them back into atoms
• Take electrons from the positive ions?
• Turn ions back into atoms by removing electrons
• Turn atoms into ions by adding electrons

What is the equation to show what happens to Cl ions at the anode.

• Cl^- --> Cl + e-   
• 2Cl^- --> Cl₂ + 2e-   
• Cl₂ + 2e-   2Cl^- 
• Cl₂ + 2e-  _-->  2Cl^- 

Tags

NGSS.HS-PS2-5

In an aqueous solution of copper chloride, which substance is produced at the positive electrode

• copper
• chlorine
• oxygen
• ^chloride 

In an aqueous solution of copper chloride, which substance is produced at the negative electrode

• copper

• chlorine

• oxygen

• ^chloride

Tags

NGSS.HS-PS2-5

• A

• B

• C

• D

Tags

NGSS.HS-PS2-5

• A

• B

• C

• D

Tags

NGSS.HS-PS1-5

Which of the following needs to be added to the water in order to perform electrolysis?

• Base

• sulfuric acid

• Sugar

• Oxygen gas

What is the ratio of hydrogen to oxygen produced by the electrolysis of water?

• 1:2

• 1:1

• 2:1

• 3:1