Processes and Systems Practical: Week 1

Chemistry of the Environment

This practical relates to the notes available in the word file named 'notes for week 1'.
Read through these notes and then attempt to answer the following 15 questions.

QUESTION 1

What is the pH of natural water in which the bicarbonate and carbonate ion concentrations are equal?

QUESTION 2

Given that a trace gas has an atmospheric residence time of 1 year, would you expect it to be more or less variable than carbon dioxide?

More

Less

QUESTION 3

If the air above a water body becomes saturated with water vapour, does evaporation cease?

Yes

No

QUESTION 4

Which of the following is correct?

"There is one Oxygen atom in a water molecule"

There is one oxygen atom in a molecule"

Question 5

What is the name of this ion: HCO3-?

Question 6

What is the name for the most abundant molecular form of oxygen in the atmosphere?

QUESTION 7

Which of these is more correct?

"The atmosphere comprises mainly molecules."

"The atmosphere comprises mainly atoms."

QUESTION 8

What is 10-3 in decimal number form?

"0.0001"

"0.001"

"0.03"

QUESTION 9

Translationary motion means?

"Continuous motion in one direction"

"Vibration"

QUESTION 10

True or False: Condensation of water molecules from mist air causes the air to become cooler?

"True"

"False"

QUESTION 11

True or False: In Australia, average rainfall with a Cl concentration greater than 10mg/l is unlikely to occur at a site 100km from the coast?

"True"

"False"

QUESTION 12

True or False: Respiration and combustion are based on different chemical reactions?

"True"

"False"

QUESTION 13

True or False: Weathering of rock releases carbon dioxide into the atmosphere?

"True"

"False"

QUESTION 14

True or False: Dioxygen is about 30 times more concentrated in the atmosphere than in surface seawater?

"True"

"False"

QUESTION 15

True or False: The pH of acid water (starting pH less than 4) varies strongly with atmospheric carbon dioxide?

"True"

"False"

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