1. Quantitative Chemical Analysis Seventh Edition Quantitative Chemical Analysis Seventh Edition Chapter 2 Tools of the Trade Copyright © 2007 by W. H. Freeman and Company Daniel C. Harris

11. m = corrected mass m’ = measured mass d a = air density = 0.0012 g ml -1 d w = calibration mass density = 8.0 g ml -1 usually d = density of object being weighed

13. The Buret

14. Digital Buret

15. Digital buret

16. Reading a buret: 1.Wash buret with brush / comet until no droplets cling to inside. 2.Prime (rinse) with new solution. 3.Eliminate air bubble. 4.Drain slowly. 5.Deliver fraction of droplet near end point. 6.Read bottom of meniscus. 7.Estimate to 1/10 of division. 8.Avoid parallax

18. Class-A volumetric flask

19. Class-B plastic vol. flask

20. Class A Teflon® vol flask

23. Volumetric pipets: td and tc