Ph scale how much more acidic

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Project Guides. View Site Map. Science Projects. Grade Levels. Physical Science. Earth and Environmental Science. Behavioral and Social Science. What is an acid or a base? What is pH? The pH Scale: Some Examples. How do you measure pH?

Figure 1. For example, the fermenting of foods. Short range pH test paper 6. For example, a range suitable for aquatic organisms. Micro range pH test paper 5. Related Stories. Ocean Acidifica Quality of pH M A primer on pH. Figure 1. The pH scale by numbers The pH scale by numbers. Figure 2. The percent change in acidity. This value is considered neutral—neither acidic or basic. Normal, clean rain has a pH value of between 5.

However, when rain combines with sulfur dioxide or nitrogen oxides—produced from power plants and automobiles—the rain becomes much more acidic. Typical acid rain has a pH value of 4. A decrease in pH values from 5. There are many high-tech devices that are used to measure pH in laboratories.