Chemistry 2272F Study Guide - Midterm Guide: Burette, Approximation Error, Analytical Chemistry

• School: Western University
• Department: Chemistry
• Course: Chemistry 2272F
• Professor: song

Document Summary

Analytical chemistry deals with methods for determining the chemical composition of samples. It is referred to as the science of chemical measurements . Qualitative analysis - identification of the constituents, e. g. , elements or functional groups, present in a substance. Quantitative analysis - measurement of the quantities of particular constituents present in a substance. Analyte - a substance whose chemical constituents are being identified and measured. Instrumental - electroanalytical (measurement of an electrical property) or spectrometric (interact of light and matter) Analytical (mettler) balance - small (less than 10g) Top loading balance - quick dispensing of reagents. Apparent weight of 9. 970g of 25c water mm. If sample is less dense than calibration weight (less than 8. 0g/ml), it will displace more air. Thus, sample will appear to weigh less than it does. Therefore, pound of bricks will appear heavier than pound of feathers. Burette tolerance is +/- 0. 05ml, relative error is 0. 1% (0. 05ml / 50ml burette).