atomic emission spectra lab report

Atomic Emission Spectra Lab Report

AP Chemistry

Sarah Hutfilz

11/20/1

1

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Table Table of Contents

!itle""""""""""""""""""""""""""""""""""""##1 !able of Contents"""""""""""""""""""""""""""""""#2 Purpose"""""""""""""""""""" Purpose"""""""""" """"""""""""""""""""" """""""""""""""#$ """"#$ Hypothesis"""""""""""""""""" Hypothesis""""""" """"""""""""""""""""" """"""""""""""""$ """"""$ %aterials"""""""""""""""" %aterials"""""" """"""""""""""""""""" """"""""""""""""""##$ """""""##$ Proce&ure""""""""""""""""""""" Proce&ure"""""""""" """"""""""""""""""""" """""""""""""#$ """#$ 'ata"""""""""""""""""""" 'ata""""""""" """"""""""""""""""""" """"""""""""""""##$ """"""##$ Prelab (uestions""""""" (uestions"""""""""""""""""" """"""""""""""""""""" """""""""""""##$ """##$ 'ata Analysis"""""""""""""" Analysis"""""""""""""""""""""""" """"""""""""""""""###) """"""""###) Postlab (uestions"""""" (uestions"""""""""""""""" """"""""""""""""""""" """""""""""""""#* """"#* Conclusion""""""""""""""""""" Conclusion""""""""" """"""""""""""""""""" """"""""""""""###+ """###+

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Purpose

!o ,ain some un&erstan&in, of the relationship bet-een emission spectra an& atomic structure Hypothesis

.f . hol& a (tip soae& -ith a solution of an element to a flame then the flame -ill chan,e color because the electrons in the element are bein, ecite& an& then they fall bac to their ,roun& state releasin, li,ht# Materials o o o o o o o o

Spectroscope Solution of strontium Solution of potassium Solution of ma,nesium Solution of barium Solution of copper  Solution of calcium 3lame

Procedure

1# Calibrate Calibrate the the no-n 4alues 4alues of mercury mercury a,ainst a,ainst the ones ones you fin& fin& in the spectro spectroscope scope to ,et the calibration cur4e# 5ou 5ou -ill use this e6uation e6ua tion to fin& the true 4alues for all the -a4elen,ths for all colors# 2# !urn !urn on the ,as ,as an& an& li,ht li,ht it it -ith -ith a matc match# h# $# Soa Soa one en& en& of a (tip (tip in in a soluti solution on of stron strontiu tium# m# )# Hol& that that same en& into into the flame flame an& ha4e someone someone else else loo in in the spectrosc spectroscope ope at the flame# # Recor& Recor& the colors colors an& their associ associate& ate& -a4elen,t -a4elen,ths hs in the the chart pro4i&e&# pro4i&e&# *# Repeat steps $ throu,h throu,h  -ith -ith the the rest rest of the soluti solutions# ons# Data

. obtaine& the results from the spectroscope for mercury an& . foun& the calibration cur4e to a&7ust all the other 4alues for the lab# . also foun& all the -a4elen,ths of the other solutions# Prelab Questions

1# 8ame the colors colors of 4isib 4isible le li,ht li,ht be,innin, be,innin, -ith that that of lo-est lo-est ener,y ener,y 9lo-est 9lo-est

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Emission is the ability of a substance to ,i4e off li,ht -hen it interacts -ith heat# Absorption is the eact opposite -here ener,y li,ht or ra&iation is absorbe& by the electrons of a particular matter# A system system propos propose& e& by the ;S 8a4y 8a4y for un&er-ate un&er-aterr submarine submarine communicat communication ion calle& calle& EL3 operates -ith -ith a fre6uency of +*Hz# 1#*1 m: 2#$?10@+ meters 1#+?10@10 miles