Save for later

Water, acids, and bases

This course is a part of AP®︎ Biology, a 38-course Topic series from Khan Academy.

Where would we be without water? Well, we probably wouldn't exist at all! Learn more about this fascinating molecule: its hydrogen bonds, its properties, and why it's a key ingredient for biological systems of all sizes. Plus, brush up on the acid-base chemistry that takes place in water (and learn how it works in your own bloodstream)!

This course contains 4 segments:

Hydrogen bonding in water

Water is key to life, and hydrogen bonding is key to understanding water! Learn how the structure of water and the properties of O and H atoms allow water molecules to "stick" to each other via hydrogen bonds, as well as why water makes a great solvent (why you can dissolve stuff in it so well).

Cohesion and adhesion

Water molecules like to stick together! Learn more about the cohesive (and adhesive) properties of water and why they're important for bugs, trees, and the tear ducts in your eyes!

Temperature and state changes in water

Ever wonder why sweating cools you off? Or why ice cubes float in a glass? If so, you're in the right place! Learn about what happens to water when it heats up, cools down, and changes state (becoming a solid or a gas). We'll see why water is great at resisting changes in temperature, and why ice is less dense than liquid water.

Acids, bases, and pH

You may know that lemon juice is acidic, and that bleach is basic. But did you know that acid-base chemistry is happening all the time in your body? Learn what makes something an acid or base, what the pH scale really measures, and how buffers work in your blood!

Set Reminder Save for later

Get a Reminder

Not ready to enroll yet? We'll send you an email reminder for this course

Send to:

Khan Academy

Rating Not enough ratings
Length 4 segments
Starts On Demand (Start anytime)
Cost Free
From Khan Academy
Download Videos On all desktop and mobile devices
Language English
Subjects Science
Tags Science

Get a Reminder

Get an email reminder about this course

Send to:

Careers

An overview of related careers and their average salaries in the US. Bars indicate income percentile.

Ecovar Technician hydrogen fueling systems $48k

Assistant Municipal Bonds Sales and Trading $56k

Associate Institutional Government Bonds Sales $58k

Account Executive - Construction Surety Bonds $63k

Municipal Bonds Sales and Trading $88k

Institutional Government Bonds Sales $96k

Institutional Government Bonds Sales Manager $106k

National Institutional Government Bonds Sales Manager $152k

Underwriter for Municipal Bonds/Public Finance Structurer $174k

Write a review

Your opinion matters. Tell us what you think.

Khan Academy

Rating Not enough ratings
Length 4 segments
Starts On Demand (Start anytime)
Cost Free
From Khan Academy
Download Videos On all desktop and mobile devices
Language English
Subjects Science
Tags Science

Similar Courses

Sorted by relevance

Like this course?

Here's what to do next:

  • Save this course for later
  • Get more details from the course provider
  • Enroll in this course
Enroll Now