Environmental Chemistry: Going Further
Concentration, pH and how a substance moves through a food chain.
8 questions, free, marked as you go with a worked explanation on every one.
What this covers
- environmental chemistry
The questions
- A lake contains 0.6 mg of a pollutant in every litre of water. Express that concentration in parts per million, given that 1 mg per litre is 1 ppm.
- A pollutant measured at 0.5 ppm in lake water is found at 25 ppm in the fish that live there. What explains the difference?
- A solution has a pH of 4. Another has a pH of 6. How do they compare?
- Which of these are true of acid deposition in Alberta? Select all that apply.
- A 250 mL sample of water contains 5 mg of nitrate. What is the concentration in milligrams per litre?
- A factory discharges warm water into a river. Fish downstream begin to struggle. What is the most likely reason?
- Which is the strongest reason to prefer a biodegradable pesticide over a persistent one?
- A student adds a base to an acidic solution until the pH reads 7. What has happened?