Explain why it is necessary to calibrate the spectroscope. and briefly outline t
ID: 898274 • Letter: E
Question
Explain why it is necessary to calibrate the spectroscope. and briefly outline the procedure that you will use to do this. An example of a calibration process is the following: Thermocouples can be used to measure temperature when It H not practical to do so with a thermometer Thermocouples measure temperature in terms of voltage. rather than directly on a temperature scale and therefore need to be calibrated Comparing the thermocouple output with the Tiding from a highly accurate thermometer allows the con-elation between voltage and temperature. Based on the calibration curve below, what is the temperature of a substance measured with a thermocouple reading of 0 498 v?Explanation / Answer
a) The calibration is done in Spectrophotometer to check that whether it is working properly or not. it ensures that the measurements obtained with the instrument are accurate.
In the calibration we use a reference solution. The reference solution zero out the equipment. which means it brings the reading to zero or to base value. After zeroing out the instrument we run the instrument.
b) values of graph not clear
3) The different alkali metals give different flame colour.
Due to movement of electrons in metal the flame colours are obtained. The electrons in sodium salts are at different energy level (sodium ion in an unexcited state has the electron configuration 1s22s22p6) than the electrons in potassium ( 1s2 2s2 2p6 3s2 3p6). So the electrons jump from these levels to higher energy state.
when the electrons jump back to the ground state to the original level. Due to this they appeared coloured.
The different energy levels in sodium and potassium we observe different colours
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