04.27.16 Lab - Mikalah Millheim Lab Partner Ashlin Chavez EXP M2 I C Mg2 Ca2 and Fe3 appear to cause the water to be hard water It was observed that the

04.27.16 Lab - Mikalah Millheim Lab Partner Ashlin Chavez...

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Mikalah MillheimLab Partner: Ashlin ChavezEXP M2April 27, 2016I.C. Mg2+, Ca2+, and Fe3+appear to cause the water to be “hard water”. It was observed that the solutions create with these cations did not have suds or contained a clear liquid, indicating that they contained hard water.D. Mg2+(aq) + 2CH3(CH2)16CO2Na (aq)→ (CH3(CH2)16CO2))2Mg (aq) + 2Na+(aq)Fe3+(aq) + 3CH3(CH2)16CO2Na (aq) → (CH3(CH2)16CO2))3Fe (aq) + 3Fe3+(aq)Ca2+(aq) + 2CH3(CH2)16CO2Na (aq)→ (CH3(CH2)16CO2))2Ca (aq) + 2Na+(aq)E. Advantageous: Neutralizes anions, reacts with and can eliminate unwanted charged particles in waterDisadvantageous: Introduces new variables to be considered into water system, perhaps causes new taste in waterII. Hardness DataCa(NO3)2Sol’n: .01 MEDTA Sol’n: .01 MTrial #mL Ca(NO3)2Initial Buret V.Final Buret V.Total VolumeMol Ca2+Mol EDTA
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110012.7012.70.00011.27x10-421012.7023.3910.69.00011.069x10-431023.3935.8012.41.00011.24x10-4Avg: .00012 molFor each trial, 10 mL of Ca(NO3)2(aq) was used. So the number of moles of Ca2+was constant at:10 mLx 1 L
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  • Spring '16
  • Christine Gaudinski
  • Chemistry, ml

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