2 LAB LEARNING Answer these questions. a. Which tools do you use more frequently in the chemistry lab? b. What measurement equipment do you usually utilise? c. Is there a biology/ microbiology lab in your school? d. Are there other science labs in your school? HANDY WORDS drying rack: support where glassware is suspended to dry. filter paper: special paper used to separate solids from liquids. flat-bottomed/florence flask: piece of glassware used to heat and store substances. forceps: used to grasp, manipulate or extract small things. litmus paper: indicator used to find out whether solutions are acidic, alkaline or neutral. pipette bulb: used to pull liquid into a pipette. ring clamp: used to clamp onto a ring stand to sit a beaker or flask. rubber stopper: used to close containers to avoid spillage or contamination. separator funnel: a funnel used to separate the components of a mixture. spatula: used to transfer powder and chemicals. stirring rod: used to agitate liquids or mixtures. syringe: used to inject or withdraw fluids. watch glass: used as an evaporating surface or to cover a beaker. 40 Module 1 ELEMENTS BENCH CHEMISTRY TOOLS 1 Decide which of the tools on p. 41 you would use to 1. heat substances and expose items to flame. ...................................... 2. support beakers or flasks when being heated on a ring stand over an open flame. ...................................... 3. hold specimens for observation or testing and contain reactions. ...................................... 4. boil liquids. ...................................... 5. heat, boil, mix, measure, store, titrate and transport chemicals. ...................................... 6. make up a solution to a known volume and to measure volumes much more precisely than with beakers or Erlenmeyer flasks. ...................................... 7. hold small amounts of chemicals during heating at high temperatures. ...................................... 8. hold solids while they are being weighed or to cover a beaker. ...................................... 9. pick up and hold substances in hot containers (such as test tube, beaker, or crucible). ...................................... 10. transfer liquid or fine-grained substances into containers with a small opening. ...................................... 11. evaporate liquids from a mixture. ...................................... 12. crush solids into powders. ...................................... 13. hold test tubes when they are not in use. ...................................... 14. rinse various pieces of laboratory glassware. ...................................... 15. dry glassware and perform other heating applications up to a temperature of about 250/300°C. ...................................... 16. burn down a sample to assess the impurities in it. ...................................... A chemistry laboratory