CH37 – Lab Day

Dates

• P1 – Tuesday, April 25th
• P3 – Tuesday, April 25th
• P5 – Monday, April 24th

Lab Day Notes

• OK to use tap water for everything
• sig figs –> temperature measurement
• two metal choices: A & B
• don’t use “too much” metal sample
• cannot use “wet” metal – be sure and return metal “dry”

Homework

• Calculations / Analysis / Conclusion in LNB
• What metal is your answer?
• Due Date: Class 39 (long block)

Lab Questions (you should know how to answer – with support – for next test)

• Why did I have to boil the water? What is true about boiling that is special?
• When should I have placed the metal into the water?
• Did the metal have to be in the water for 10 minutes? Why?
• Did it matter that I used tap water? (not distilled)
• Did the thermometer impact the result of the lab when I used it to stir?
• Where should the thermometer be placed to measure temp of water?
• What happens if water drips from test tube when metal is moved to calorimeter?
• How long should it take to move the metal to the calorimeter after heating?
• Did the amount (mass) of metal used impact uncertainty in the lab?
• Why did I measure the volume of water in calorimeter? What formula uses this?
• Did the volume of the bath water impact result of the lab?