CHEM.12.B

Previous Next
The student is expected to define acids and bases and distinguish between Arrhenius and Bronsted-Lowry definitions;
1666 TEKS header image

Knowledge and Skills Statement

Science concepts. The student understands and applies various rules regarding acids and bases.

any substance that in aqueous (water) solution tastes sour, changes blue litmus paper to red, reacts with some metals to liberate hydrogen, reacts with bases to form salts, promotes chemical reactions (acid catalysis), and has a pH less than 7

any substance that in aqueous (water) solution is slippery to the touch, tastes bitter, changes the color of indicators (e.g., turns red litmus paper blue), reacts with acids to form salts, promotes certain chemical reactions (base catalysis), and has a pH greater than 7

Research

Jensen, W. B. "The Origin of the Term "Base." Journal of Chemical Education 83, no.1 (2006): 1130. https://www.proquest.com/scholarly-journals/origin-term-base/docview/211928474/se-2

Summary:  In response to a question, the origins of the term base as used in acid-base chemistry are examined. The term appears to have first been used in 1717 by the French chemist, Louis Lemery.

Research

Liliasari, S., A. Albaiti, and Andi Wahyudi "Calcium Contained Tap Water Phenomena: Students Misconception Patterns of Acids-Bases Concept." Journal of Physics: Conference Series 1013, no. 1 (2017): 012095. https://doi.org/10.1088/1742-6596/1013/1/012095

Summary:  The aim of this research was to explore student’s misconception pattern about acids and bases phenomena in daily life, such as calcium contained tap water. The results showed five patterns of students’ misconception when explaining the phenomena of calcium carbonate precipitation upon heating tap water. No student gave the correct explaination for this phenomena. This research contributes to designing meaningful learning and achieving better understanding.