Choose the INCORRECT Statement

question 90

Multiple Choice

Choose the INCORRECT statement.

• A)Temporary hard water contains the bicarbonate ion.
• B)Permanent hard water also contains anions other than bicarbonate.
• C)Ion exchange is accomplished by mixing chemicals in the water to precipitate hard water ions.
• D)Deionized water is water with ions removed by ion exchange.
• E)Boiler scale is a mixed precipitate of CaCO₃,MgCO₃,and rust.

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Definitions:

Standard Deviation

A statistical measure of the dispersion or variation in a set of numbers, indicating how spread out the values are.

Inverse Relationship

A type of correlation where one variable increases while the other decreases, and vice versa.

Negative Correlation

A linkage between two variables that demonstrates an inverse relationship: one rises as the other falls.

Correlational Research

A research method that examines the relationship between two or more variables to determine if they are associated.