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McQuade 1

Maria McQuade

Chemistry 102

Experiment 9

Results:

In Part A of the lab e dissol!ed iron poder in "M #2$%&'a() and added "M

*a%#'a() to the solution 'our *a%#'a() as sli+htly yello), A +reen

precipitate- .e'%#)2's)- formed, /e then adusted the p# to around four and

added oxalic acid '#2C2%&'a()) to .e$%&'a() to form the yello precipitate

.eC2%&'s), o form  "3.e'C2%&)"45"#2%- e added  2C2%&'a() hich made the

solution red in color and then added #2%2'a() hich made the solution turn

blac6 'hen stirred the blac6 color faded), 7astly- e added #2C2%&'a() hichturned the solution blac6 and 8y,

In :un 1 e found ;1,0< oxalate 'C2%&2=) and 9,>>< iron '.e"?), In :un 2 e

found ;&,&< oxalate 'C2%&2=) and 10,0< iron '.e"?), If the sample e

analyed had been pure  "3.e'C2%&)"45"#2%- the expected percent of oxalate

'C2%&2=) ould ha!e been ;",@< and the expected percent of iron '.e"?)

ould ha!e been 11,">

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McQuade 2

I aBrm that I ha!e carried out my academic ende!ours ith full academic

honesty,

3$i+ned- Maria McQuade4