Results: Since there is no Canadian Drinking Water Guideline for Ammonia you will compare results to the European Union limit. The standard should give a result very close to the 0.5 mg/L colour; if the colour is darker then it DOES NOT meet the guidelines.
To allow students to run tests on five different sources of water. Students are expected to collect three samples of water: Urban and Rural (includes Aboriginal and non-Aboriginal communities) treated waters, and a Raw Source Water.
1. One bottle contains 5 micrograms/L arsenic. Put 100 mL of water sample in the second plastic bottle with lid (not the flip top type). Water should be room temperature (20-25 degrees C).
Students enter their results for the tests: alkalinity, ammonia, colour, copper, pH, sulphate, total chlorine, and total hardness. Students compare their results to the Guidelines for Canadian Drinking Water Quality.
1. Put the students into groups of 3-5. 2. Provide the students with the "Not In My Backyard?" handout. 3. Have the students define the problem and determine what they know about the problem, what they need to learn more about, and where they need to look to find information. 4. Groups conduct research, find information, and work towards deciding what they should do. The teacher acts as a metacognitive coach, serving as a model.
1. The first thing you are going to want to do with your Operation Water Drop kit is to use it. Test the water samples you have been given and your local drinking water (as well as three other water samples such as urban, rural and raw water, in the case of High School Operation Water Drop kits) with the kit’s contents. Record these test results.
SDS sheets for chemicals in Operation Water Drop kits. Includes SDS sheets for acetic acid, glacial; ammonia standard 1000 ppm; arsenic standard; arsenic reagents and testing pad; barium chloride dihydrate; copper standard 1000 ppm; iron ferro reagent; iron standard 1000 ppm; magnesium chloride hexahydrate; manganese 1000 ppm; methyl purple indicator; pH 7 buffer solution; potassium nitrate; sodium acetate trihydrate; sodium sulfate anhydrous; and sulfuric acid.
