Today we belong to a modern world with domination of electronic equipment everywhere in each and every field. These instruments are the main basis of analytical Chemistry. Before you can proceed to some chemical analysis. You need to know about those instrument and their functions how they actually work. How they are calibrated and how measurement is taken? Let us take and example suppose you are measuring Sulphuric acid...
For this first you need to know what is the instrumental tolerance of your instrument. If you are measuring the volume using a measuring cylinder then you should know that how much possible error in volume could happen in your measurement. Instrumental tolerance is the error bar of an instrument. For example you may see at the top of your measuring cylinder that it is written 50ml±2ml. It means that if you measure 50ml with the cylinder you may get ±2 ml error. Temperature plays vital role while we are measuring volume, if you are measuring at high temperature your volume may be less more exact volume at NTP, and if you are measuring volume at low temperature your volume may be more than exact volume at NTP. But in above case the amount of material that you will take will be exactly reverse, it means at high temperature you may take less amount of substance because of expansion in volume and in low temperature you may take more amount of substance due to contraction.
For this first you need to know what is the instrumental tolerance of your instrument. If you are measuring the volume using a measuring cylinder then you should know that how much possible error in volume could happen in your measurement. Instrumental tolerance is the error bar of an instrument. For example you may see at the top of your measuring cylinder that it is written 50ml±2ml. It means that if you measure 50ml with the cylinder you may get ±2 ml error. Temperature plays vital role while we are measuring volume, if you are measuring at high temperature your volume may be less more exact volume at NTP, and if you are measuring volume at low temperature your volume may be more than exact volume at NTP. But in above case the amount of material that you will take will be exactly reverse, it means at high temperature you may take less amount of substance because of expansion in volume and in low temperature you may take more amount of substance due to contraction.
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