Conclusion lab 2

Conclusion lab 2 - Conclusion In the first part of the lab,...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Conclusion In the first part of the lab, the class was challenged to discover whether or not XRF could be a reliable measuring tool for the bulk matter of a sample or was limited to measuring the surface composition only. After completing the lab it was found that filing the penny and testing the shavings allowed for a 17.08 percent closer measurement of the copper content and a 16.92 percent closer measurement of the zinc content. The measurements from the filed pennies were undoubtedly closer to the actual percent compositions determined by the U.S. Mint. In order to make an estimate of the unknown sample’s composition a calibration curve of the data was needed. A plot of the copper peak count rate versus the percent mass of the copper compound allowed students to develop a trend line from which an estimate regarding the unknown could be taken. The unknown was measured twice using XRF and the two values were averaged together to minimize error in the unknown sample’s XRF analysis. From the calibration curve and the measured
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/10/2010 for the course CHEM 232212 taught by Professor Brown during the Spring '10 term at Ohio State.

Page1 / 2

Conclusion lab 2 - Conclusion In the first part of the lab,...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online