7/26/2019 Latihan Soal Kimia Analisis

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PROBLEM SET ANALYTICAL CHEMISTRYActivity

18 March 2016

Pleae re!er t" Ta#le 8$1 a%& A''e%&i( ) !"r i%!"r*ati"% "% activity c"e+cie%ta%& "l,#ility 'r"&,ct- re'ectively.

1. Calculate the ionic strengths (in M) of solutions with the following compositions:/A0.050 M Ca(NO3)2+ 0.0! M Mg(NO3)2"/B0.25 M #Cl + 0.$5 M NaCl"/C0.20 M (N#%)2CrO%/2.&5 ' $02M aCl3+ 3.5& ' $02M *2O%"/E0.2 M NaO#

2. ,his pro-lem is intene to gi/e ou practice in interpolating acti/it coe1cients (see

page $!$$!2). Calculate the acti/it coe1cient of:/ACNin a solution that has an ionic strength () of 0.035 M"/BCa2+in a solution with 0.0&5 M/CC#3CO2(acetate ion) in a solution with 4.5 ' $0 3M/n2+in a solution with 0.002 M

. sing acti/ities6 calculate the solu-ilit of 7g2O%(sil/er sulfate) in/Aeioni8e #2O"/B0.025 M *NO3. 9ou ma ignore the contri-ution of 7g+an O%2to the ionic strength.

3. sing acti/ities6 calculate the solu-ilit of amorphous n(O#)2in 0.020 M *2O%.

4. sing acti/ities6 calculate the solu-ilit of ;-