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Nuffield seminar: outdoor science

Nuffield seminar: outdoor science. Chemistry Trails Dr Peter Borrows 30 th March 2010 The School of Education, Birmingham University. Concrete stalactites?. Making cement 3CaCO 3 (s) + Al 4 Si 4 O 10 (OH) 8 (s)  Ca 3 SiO 5 (s) + Al 4 Si 3 O 12 (s) + 4H 2 O(g) + 3CO 2 (g)

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Nuffield seminar: outdoor science

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  1. Nuffield seminar: outdoor science Chemistry Trails Dr Peter Borrows 30th March 2010 The School of Education, Birmingham University

  2. Concrete stalactites? Making cement 3CaCO3(s) + Al4Si4O10(OH)8(s)  Ca3SiO5(s) + Al4Si3O12(s) + 4H2O(g) + 3CO2(g) CaCO3(s)  CaO(s) + CO2(g) Cement setting CaO(s) + CO2(g)  CaCO3(s)

  3. Some CaO remains unreacted Water leaches through the concrete CaO(s) + H2O(l)  Ca(OH)2(s) Ca(OH)2(s) + aq  Ca(OH)2(aq) Yes, you get lime water

  4. Some CaO remains unreacted Water leaches through the concrete CaO(s) + H2O(l)  Ca(OH)2(s) Ca(OH)2(s) + aq  Ca(OH)2(aq) Yes, you get lime water Ca(OH)2(aq) + CO2(g)  CaCO3(s) + H2O(l)

  5. Visit your local Laboratory for the Investigation of Long-term Corrosion

  6. Why bother with chemistry trails / outdoor chemistry?

  7. Enjoy healthy, glossy hair coloured to a fresh and lively shade using Logona Natural Herbal Hair Dyes. 100% natural ingredients! These natural hair dyes contain only natural plant colourants and conditioning ingredients, such as certified organically grown henna, walnut shells and buckthorn bark. Chemical Free These natural hair dyes contain no PPD, peroxide, preservative, ammonia or any other chemicals. 

  8. Chemistry doesn’t just happen in test tubes.

  9. Why ITT?

  10. Using chemistry trail ideas with children • Take the class on a local walk • Set a homework for them to find 3 examples of protecting iron from corrosion (& take a picture with their mobile phone?) • A project for the G&T to produce a trail around the school

  11. Sources of ideas • Borrows, P., 1984, The Pimlico chemistry trail, School Science Review, 66 (235), 221-233. • Borrows, P., 2006, Chemistry outdoors, School Science Review, 87(320), 23-31. • Borrows, P (2004) Chemistry Trails. in Learning Science Outside the Classroom, eds.Braund, M. and Reiss, M. pp 151 – 168. London: RoutledgeFalmer. • Borrows, P Education in Chemistry, ca. 500 words in 2-3 issues per year since 1994 • peter@borrows.demon.co.uk

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