Most Naturally Occurring Freshwater Has a PH Between 7 and 5.6

question 9

Multiple Choice

Most naturally occurring freshwater has a pH between 7 and 5.6. This is due to dissolved, naturally occurring acids. Which is the most common acid associated with this process?

• A) hydrochloric acid
• B) carbonic acid
• C) sulfuric acid
• D) nitric acid
• E) Both c and d

---

Definitions:

Regression Equation

An equation that describes the relationship between a dependent variable and one or more independent variables.

Calculate

To ascertain a value through mathematical processes.

F

A statistical test used to determine the significance of multiple group comparisons simultaneously, often used in analysis of variance (ANOVA).

Slope

In the context of mathematics and statistics, it refers to the steepness or angle of a line on a graph.