Chapter 4 SABIS Grade 11
Lesson 13
🎉 Welcome to the Fascinating World of Electrolysis! 🎉
⚡ What is Electrolysis? ⚡
Electrolysis may sound like a term from a sci-fi movie, but guess what? It's happening around us every day! It's a process that breaks down ionic compounds into their individual ions using electricity. 🌩️
👀 Electrolysis in Daily Life 👀
Did you know you encounter products of electrolysis every day? 😲
When you use aluminum foil 🍽️ for your yummy dinner, remember that electrolysis was used to extract aluminum from its ore. Or when you're admiring the gold plating 💍 on jewelry, that's also done by electrolysis! So next time you see these items, give a quick thanks to electrolysis! 😉
💡 Breaking Down Ionic Compounds 💡
But how does electrolysis work, you ask? Well, it starts with an ionic compound. This compound is made up of positively charged ions, called cations, and negatively charged ions, known as anions. They stick together because opposites attract, right? 💖
But when we add electricity into the mix, it's like a dance party, and all the ions want to dance with the electric current! 💃🕺🎶
🧲 Forming Ions from Ionic Compounds 🧲
So how do we get these ions? Let's take a look at Sodium Chloride (NaCl), a classic ionic compound.
Sodium (Na), a metal, loses an electron to become a cation (Na+), and Chlorine (Cl), a non-metal, gains that electron to become an anion (Cl-). Together, they form Sodium Chloride (NaCl) through an ionic bond!
But remember, this process can also go in reverse during electrolysis! When electricity is applied, NaCl breaks up into its individual ions again (Na+ and Cl-) ready to join the ion dance party! 🥳 🎯 Electrolysis Quiz 🎯
What does the process of electrolysis break down?
a. Atoms
b. Covalent compounds
c. Ionic compoundsd. Molecules
Which of the following is a product of electrolysis that you might use in daily life?
a. Aluminum foil
b. Wooden furniture
c. Plastic bottled. Glass window
What happens to an ionic compound during electrolysis?
a. It becomes a covalent compound.
b. It breaks down into individual atoms.
c. It breaks down into individual ions.
d. Nothing changes.
In an ionic compound, what do you call the positively charged ion?
a. Atom
b. Anion
c. Cation
d. Molecule
What happens to Sodium Chloride (NaCl) during electrolysis?
a. Sodium and Chlorine atoms combine to form Sodium Chloride.
b. Sodium Chloride is converted into a covalent compound.
c. Sodium and Chlorine atoms are separated, and Sodium Chloride disappears.
d. Sodium Chloride breaks down into Sodium ions (Na+) and Chloride ions (Cl-).
results
if failed question 1
Let's revisit electrolysis with a solution of Sodium Chloride (NaCl):
Electrolysis of Sodium Chloride (NaCl) will result in:
a. Sodium and Chlorine atoms combining to form Sodium Chloride.
b. Sodium Chloride being converted into a covalent compound.
c. Sodium and Chlorine atoms being separated, and Sodium Chloride disappearing.
d. Sodium Chloride breaking down into Sodium ions (Na+) and Chloride ions (Cl
If student failed question 2:
What are the products of electrolysis of water (H2O)?
a. Oxygen and Hydrogen atoms
b. Hydrogen and Oxygen ions
c. Hydrogen gas (H2) and Oxygen gas (O2)
d. Water molecules (H2O)
If student failed question 3:
The electricity in electrolysis is used to:
a. Create new compounds
b. Cause a chemical reaction between elements
c. Break down compounds into their constituent ions
d. Heat the solution to boiling point
If student failed question 4:
In the electrolysis of Sodium Chloride, where do Sodium ions (Na+) migrate?
a. They stay in the middle of the solution
b. They move towards the anode (negative electrode)
c. They move towards the cathode (positive electrode)
d. They evaporate into the air
If student failed question 5:
What happens to the ions at the electrodes during electrolysis?
a. They combine to form the original compound
b. They lose or gain electrons to form neutral atoms or molecules
c. They are destroyed in the process
d. They convert the electrode into a new compound