Environmental Chemistry: Further Practice

Eutrophication, water treatment, plastic persistence, and acids and bases around the house.

8 questions, free, marked as you go with a worked explanation on every one.

What this covers

Excess fertilizer runs off farmland into a lake, adding large amounts of nitrogen and phosphorus. This commonly triggers which problem?
A water treatment plant must dose 2 mg of chlorine per litre of water. How many milligrams of chlorine are needed to treat 500 L?
Which best describes why plastic waste is a long-term environmental concern compared to food waste?
Vinegar has a pH of about 3, and ammonia-based cleaner has a pH of about 11. Which correctly describes them?
Which lists the typical order of steps a municipal water treatment plant uses to make river water safe to drink?
Use the table below, listing four sources of acidity in rain and whether each is natural or human-caused. Which is a natural source?
A water sample contains 180 mg of dissolved calcium carbonate per litre. Water is classified as hard above 120 mg/L. By how many milligrams per litre does this sample exceed the hard-water threshold?
A community switches from burning coal to burning natural gas for electricity. Which pollutant most directly decreases as a result, with respect to acid deposition?