Question

7. You are calibrating a thermometer to use for several experiments. The freezing point reads -3.00C and the boiling point is 102.0C. Show the calibrations calculations. 8. You are using the same thermometer you just calibrated in #7 for melting point that reads 125.0C. What is the actual melting point of the chemical? 9. You are using the same thermometer from #7 for a distillation experiment. According to the lab, you should be collecting distillate in the specific range of 99.0-140.0C. What temperature range should you start and stop collecting when looking at the actual thermometer?

Answer 1

The achial tharrmome lir shows for freezing point of water which is actually to 0°c. and 102°C for boiling point of water which is actually 100% we can write the calibration ean as, T(oc) - 0 o - (-3) 102-(-3) -) net 3 T(oc) 100 do 1064 x + 3 =21T a = 1.05T-3 This is the calibration ean. for the actual ethermometin The actual me melting point of the chemical which reads 135 °C the thermomelin will be here 00: 125oC -) 125= 1.05 T-3 - T=121.905°c fal.905°C, So the actual melting point of chemical is

9. The lower limit is the of range 9900, DO SO ne = 1.05 (99)-3 100.95 °C The limit of the upper is 140°c range so, o 1.05 (140) 3 = 144°c to im accial thermomelin the limperalux range you should chant and stop collecting when looking at actual thermomelin is 100.95°C - 140°C