The pH scale | Middle school chemistry | Khan Academy

Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/science/m... Want to explore more? Check out the full middle school playlist here:    • Middle school chemistry | Khan Academy   pH measures how acidic or basic a solution is based on the relative amount of charged hydrogen atoms (H⁺) present. The pH scale ranges from 0 to 14, with acids below 7, bases above 7, and neutral substances equal to 7. Indicators like litmus paper and universal indicator help determine pH by changing color based on the solution’s acidity or basicity. 00:00 What's going on here? 01:02 What is pH? 03:47 Litmus test 05:38 pH papers & universal indicators 06:45 Complete definitions of acids/bases 7:07 Summary Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help! Donate or volunteer today! Donate here: https://donate.khanacademy.org/give/4... Volunteer here: https://www.khanacademy.org/contribut...