2026 End of Year Science Vocabulary Competition Practice Test - Free Science Vocabulary Practice Questions and Study Guide

Bases raise the pH of a solution, making it less acidic by either consuming hydrogen ions or producing hydroxide ions. On the pH scale, values above 7 indicate basicity, 7 is neutral, and below 7 indicates acidity. So the pH range that characterizes bases is above 7. Examples like soap, ammonia, and baking soda have pH values greater than 7. The full scale runs from 0 to 14, but bases occupy the portion higher than 7, with strong bases pushing pH toward the high end. Meanwhile, acidic solutions sit below 7 and neutral solutions are at 7.