Chemistry - Chapter 14 (MC #3)

Which federal agency regulates bottled water?

FDA

What percentage of public water supplies in the United States do NOT meet one or more of the EPA water standards?

10%

About ________ of the world's fresh water supply is used in agriculture.

70%

Which of the following statements about bottled drinking water is true? - Bottled water is healthier than tap water. - Bottled mineral water often contains more dissolved ions than tap water. - Bottled water is safer than tap water. - All bottled water comes from natural springs or artesian wells.

Bottled mineral water often contains more dissolved ions than tap water

The pHpH of rainwater is not 7.0 because atmospheric ______ dissolves in raindrops to form ______, which ______ the pH of rainwater.

CO2, Carbonic acid (H2CO3), lowers

Which treatment method is best at removing trihalomethanes such as chloroform?

Charcoal filtration

Which of the following uses the greatest amount of water in the United States? - public water supplies - cooling for electric power plants - industrial manufacturing - agricultural irrigation

Cooling for electric power plants

The major use of water in the United States is for public water supplies.

False

Which of these common human activities contribute to BOD? - paddling a boat across a lake or pond - fishing in a lake or pond - dumping detergents in a lake or pond - swimming in a lake or pond

Dumping detergents in a lake or pond

Which federal agency regulates drinking water standards from municipal water supplies?

EPA

The Clean Water Act has had no impact on water quality over the past two decades.

False

One of the advantages of treating sewage effluent with ozone as opposed to chlorine is

O3 is more effective in killing viruses

What substances remain in wastewater after effective secondary treatment?

Organic molecules, phosphates, nitrates

Which of the following processes is not used in a conventional method of water treatment? - percolation - phytoremediation - filtration - aeration

Percolation

Part complete Identify each of the following as a primary, secondary, or tertiary method of wastewater treatment. - Sand and Gravel filters - Reverse Osmosis - Settling Basin

Primary: Settling Basin Secondary: Sand and Gravel filters Tertiary: Reverse Osmosis

Identify the pros and cons of using bottled water.

Pros: - Safe and Convenient - Taste Cons: - Manufacturing requires petroleum and a lot of energy - Very expensive

Advanced treatment of wastewater can include any of the following EXCEPT - phytoremediation. - reverse osmosis. - sand and gravel filtration. - charcoal filtration.

Sand and gravel filtration

Consider the statement "BOD (biological oxygen demand) indirectly measures the levels of sewage in water, because microorganisms in sewage release oxygen into the water." Which of the following is true? - The statement is wrong, but the reason is correct. - The statement is correct, but the reason is wrong. - Both the statement and the reason are correct. - Neither the statement nor the reason is correct.

The statement is correct, but the reason is wrong

Secondary treatment of sewage involves

filtering and aeration.

Consumption of water with high levels of nitrate is particularly hazardous to

infants

Charcoal filtration of wastewater is an excellent method for the removal of

organic molecules.