Nelson Science 10 – p. 179 Q. 1-5 Understanding Concepts – Chemicals in Action Page 179 - Questions 1 to 5 1a) In what ways are household wastes hazardous? - Corrosive, poisionous, flammable, explosive 1b) Which type of hazard is posed by the largest number of products? - Poisionous 2. Give an example of hazardous substances that might be found: a) In the garage – antifreeze, batteries b) In the kitchen - cleaners and bleach c) in the bathroom – nail polish remover, toilet cleaner d) in the garden – pesticides 3. Give two examples each of the physical changes and the chemical changes involved in the use of household products. Physical Changes – change in colour, becomes darker (murky) or lightens (looses concentration). Develops a film – as in painting supplies that are stored. Separation of liquids. Chemical Changes – becomes stronger (concentrates), rusting. 4. Where in the house do you find the highest concentration of hazardous compounds? Why do you think that this is so? - Bathroom - medicine cabinet - Kitchen – under the sink (detergents, bleaches, cleaners) 5. Find five household products that have suggestions for first aid treatment on the labels. What general suggestions are made? 1.Vitamins – store in a fridge or at room temperature. Keep away from children. If taken in wrong dosage contact poision control. 2.Bleach – poisionous and corrosive – contact poision control immediately, do not induse vomiting. 3.Mouthwash – Do not swallow, not for children under age 6. In case of accidental ingestion contact poison control centre or doctor immediately. Store between 15 and 30 degrees. 4.Hairspray – explosive and flammable – Do not use in the presence of a flame or spark. Avoid smoking while using and until hair is dry. Contents are under pressure. Do not place in hot water or near radiators, stoves or other sources of heat. Do not puncture or incinerate container or store at temperatures above 50 degrees celcius. Do not spray into eyes. Keep out of reach of children. Intentional misuse by concentrating or inhaling the contents can be harmful or fatal. 5.Ibuprofen – Keep out of reach of children. Warning this package contains enough medication to seriously harm a child. Store between 15 and 30 degrees Celcius. Protect from heat and humidity.
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