Mixing water lab

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Mixing water lab

  1. 1. Remember your goals you set yesterday!!
  2. 2. Mixing Water Lab With a little help from Owen and Amy
  3. 3. Hmm…we wonder <ul><li>What will happen if we mix equal amounts of hot and cold water – one sample is 10  C and the other one is 50  C? </li></ul>
  4. 4. Write down your hypothesis and explain your reasoning Glue worksheet on page 45. (Hint: might want to wait until you’re done with lab to keep it dry!)
  5. 5. Materials <ul><li>3 foam cups </li></ul><ul><li>4 glue sticks </li></ul><ul><li>2 graduated cylinders </li></ul><ul><li>2 bulb pipettes </li></ul><ul><li>1 glass thermometer </li></ul><ul><li>Note: Glass thermometers are very breakable and you are responsible for replacing them (cost: $15). Keep them in your tray when not in use to prevent them from rolling off your table. </li></ul>Return materials just like they are in this picture. Thanks!
  6. 6. Use the pipette to get EXACTLY EQUAL measurements!!
  7. 7. Take temperature of water AFTER you’ve put it in the graduated cylinders. Record.
  8. 8. New Prediction… <ul><li>What will the resulting temperature be when you mix the 2 samples of water you have at your table? Record your new hypothesis and be ready to share with the class. </li></ul>
  9. 9. Mix water together in 3 rd cup
  10. 10. Take temperature of water And DON’T put anything in your mouth!!
  11. 11. Clean-up and put materials away
  12. 12. Record your results
  13. 13. A message from our sponsors
  14. 14. Equations T final = T hot + T cold 2 T final = T 1 + T 2 + T 3 . . . T n n N = number of samples
  15. 15. Reflection page 44 <ul><li>Illustrate AND explain what you think is happening to the particles of water when you mixed the hot and cold water. </li></ul>

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