What Makes Things Alkali?

This video tutorial explores alkaline materials, their uses, and how they neutralize acids. It explains how to test for alkalis using litmus paper and defines alkalis as ionic compounds. The video covers various theories of bases, including Arrhenius, Lewis, and Bronsted-Lowry, and discusses equilibrium constants and the pH scale. It highlights the strength and safety of bases, noting that strong bases are reactive and corrosive, while organic alkalis are weaker.

What is a common use of alkaline materials?

• To make cleaning products

• To enhance food flavor

• To produce electricity

• To create acidic solutions

According to Arrhenius theory, what does a base produce in water?

• Hydrogen ions

• Sodium ions

• Chloride ions

• Hydroxide ions

In Bronsted-Lowry theory, a base is defined as:

• A hydroxide ion producer

• A proton acceptor

• An electron pair acceptor

• A proton donor

Which indicator is suitable for detecting alkalis?

• Bromothymol blue

• Methyl orange

• Phenolphthalein

• Litmus paper

Why are strong bases considered dangerous?

• They emit toxic fumes

• They are highly flammable

• They are explosive

• They are very reactive and corrosive