Chemistry Fun Fun o o Integrating fun time

Chemistry: Fun, Fun o o Integrating fun time with chemical principles Covering areas with daily life relevancy Nurturing the interests of the public to chemical science The eye-catching words are Fun Game, Forensic Science & Environmental Science IYC 2011 At HKBU

PRODUCTION TEAM Director: Professor Wing Hong Chan Assistants: Ms. Silvia Mo; Ms. April Lau, Mr. Eric Jim; Mr. John Ng; Mr. David Chik; Mr. Alwi Mak Department of Chemistry Hong Kong Baptist University

Wordless Bible (無字天書) using solution 1 to write a word, then spray it with solution 2 to generate the color. Many chemical reactions by mixing two colorless solutions can produce colored product(s), viz. , o. Acidic phenolphthalein solution contacts with alkali solution (red color) o. Iodide solution reacts with H 2 O 2 (brown) o. Iodide/starch reacts with iodate (blue) Fun Chemistry

Fantastic Filter Paper(七彩濾紙 ) o o To make a drawing on a filter paper with color sign pen. Fold the filter paper in a cone shape Immerse the paper in a water tank Allow water flow through the paper to develop color pattern Fun Chemistry

Chemical Magic Board(化學魔術版) Soak a filter paper with iodide solution Place the paper on a copper plate Make electric connection between the metal plate and a battery Use another electrode to draw a diagram on the paper As the result of a redox reaction, a color pattern may emerge. Fun Chemistry

DIY Souvenir (製作電鍍紀念品) o o o Use oil-base sign pen to draw an art design onto a copper plate Put the copper plate into a nickel plating bath Connect the copper plate to the cathode of a battery Graphite electrode was used as the anode After 10 min of electrolysis, a nice pattern will be formed on the surface of the Cu plate Fun Chemistry

Preserve your finger print (指紋記) o o o Wet your finger tip with a film of paraffin Make your finger print onto a filter paper Use carbon powder to trace the print Cover the finger print with a tape A permanent finger print could be obtained Forenic Chemistry

Is it really a blood stain? o o Cover the stain with two blood testing solutions sequentially Formation of a blue color on the stain implies that the stain is a blood stain Forensic chemistry

Ink chromatography o o o The composition of the ink of a sign paper can be established by TLC technique. Compare the TLC pattern of the ink of a pen with that of the print in a “ransom letter” The act allows getting proof from the pen involved in a crime case Forensic Chemistry

Green House Effect Simulator o o Use a sun-light lamp as the source of the sun A container is filled with carbon dioxide (could be generated in situ) Another container is filled with air as the control Turn on the lamp, monitor the temperature of the two containers Environment Chemistry

Acidification of marine water by carbon dioxide o o o Check the p. H of distilled water with a p. H electrode or p. H paper Saturate the solution with carbon dioxide (generated in situ or use dry ice as the source) Double check the p. H of the resultant solution Environment Chemistry

Separating plastic waste by density o o o Common consumer plastics such as PE, PP, PVC, PS, PET having different density Prepare a bath of solution of different density according to the density of the pastic wastes The separation of the mixed plastic wastes could be achieved in a systemic manner Environment Chemistry