A Sample of Water Has Hardness Expressed as 1

question 40

Multiple Choice

A sample of water has hardness expressed as 1.6 × 10² ppm Ca²⁺. The sample is passed through an ion exchange column and the Ca²⁺ ions are replaced by H⁺ ions. What is the pH of the water after it has been treated? (1 ppm = 1 g solute/106 g solution)

• A) 2.09
• B) -.80
• C) 1.10
• D) 7.00
• E) 2.40

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Definitions:

Cash Surrender Value

The amount that the insurer has agreed to pay to the insured if a life insurance policy is canceled before the insured’s death.

Term Insurance

A type of life insurance policy for which premiums are paid for a specified term and payment is made by the insurer only if the insured dies within the term period.

Cancel Policy

A cancel policy refers to the terms under which an agreement, insurance policy, or service contract can be terminated before its natural expiration date.

Advance Written-notice

A notification given in writing ahead of time, often a requirement in legal and contractual situations.