instru medida de ph

LAB. DE ANALISIS POR INSTRUMENTACION I

LAB. DE ANALISIS POR INSTRUMENTACION IMEDIDA DE pHMEDIDA DE pH

A) Experiencia A:1. Determinacin del pH de diversas soluciones:SolucionespHpH promediopH Terico

HCl 0,1N2,072,082,032,061,00

BUFFER:CH3COOH 0,1NNaCH3COO 0,1N4,524,504,484,504,76

Cerveza4,484,474,464,474,50

Vino3,433,443,453,444,20

Vinagre 19,14N4,063,653,653,785,76

a) Preparacin 100mL de Solucin Buffer Acida:

a.1) Hallar el pH:

0,1 0,1 0,1

#moles iniciales 0,1 - - #moles en el equilibrio X X X #moles finales 0,1-X X X

b. Preparacin 250mL de cido Clorhdrico:

a.2) Hallar el pH:

0,1 0,1 0,1

c. pH de la Vinagre:

#moles iniciales 0,1 - - #moles en el equilibrio X X X #moles finales 0,1-X X X

B) Experiencia B1. Titulacin con NaOH0,1N con Biftalato de potasio:Masa de Biftalato de potasio(g)Volumen (mL) NaOH0,1NNormalidad corregida del NaOH(N)

1 titulacin0,495126,350,0920

2 titulacin0,534028,350,0922

3 titulacin0,516228,040,0902

0,0915

1 Titulacin

2 Titulacin

3 Titulacin

Titulaciones:

1 Titulacin:

VNaOH(mL)pHVpH1pH1/VV12pH/V2V2

04.38

7.14.917.10.170.02393.550.026.05

105.082.90.320.11038.55-0.0110.53

155.450.380.076012.5-0.0115.00

205.7850.120.024017.50.0319.03

21.15.91.10.120.109120.55-0.0921.05

226.020.90.020.022221.550.1421.83

22.26.040.20.020.100022.10.5022.20

22.46.060.20.040.200022.3-0.5022.40

22.66.10.20.020.100022.50.5022.60

22.86.120.20.040.200022.70.0022.80

236.160.20.040.200022.90.0023.00

23.26.20.20.040.200023.1-0.4023.23

23.56.240.30.030.100023.351.5023.45

23.66.270.10.040.400023.55-1.3323.63

23.86.310.20.040.200023.70.0023.80

246.350.20.040.200023.9-0.2524.00

24.26.390.20.030.150024.10.5024.20

24.46.420.20.050.250024.30.0024.40

24.66.470.20.050.250024.50.2524.60

24.86.520.20.060.300024.70.7524.80

256.580.20.090.450024.9-1.2525.00

25.26.670.20.040.200025.11.2525.20

25.46.710.20.090.450025.3-0.7525.40

25.66.80.20.060.300025.51.5025.60

25.86.860.20.120.600025.763.5025.80

266.980.22.6613.300025.9-11.7226.45

289.6420.820.410027-0.0228.00

3010.4620.750.375029-0.0930.75

3511.2150.290.058032.5-0.0135.00

4011.550.160.032037.5-0.4740.00

4511.665-11.66-2.332042.5

Volumen equivalente de NaOH= 26,35mL

2 Titulacin:VNaOH(mL)pHVpH1pH1/VV12pH/V2V2

04.33

54.7350.30.06002.50.005.00

105.0350.290.05807.50.0010.00

155.3250.330.066012.5-0.0115.00

205.6550.080.016017.50.0219.00

215.7310.090.090020.50.0121.00

225.8210.10.100021.50.0122.00

235.9210.110.110022.5-0.0823.00

246.0310.030.030023.50.2023.80

24.26.060.20.030.150024.10.0024.20

24.46.090.20.030.150024.30.0024.40

24.66.120.20.030.150024.5-0.2524.60

24.86.150.20.020.100024.70.5024.80

256.170.20.040.200024.9-0.2525.00

25.26.210.20.030.150025.10.2525.20

25.46.240.20.040.200025.3-0.2525.40

25.66.280.20.030.150025.50.2525.60

25.86.310.20.040.200025.70.0025.80

266.350.20.040.200025.90.2526.00

26.26.390.20.050.250026.10.0026.20

26.46.440.20.050.250026.30.0026.40

26.66.490.20.050.250026.50.2526.60

26.86.540.20.060.300026.70.0026.80

276.60.20.060.300026.9-0.2527.00

27.26.660.20.050.250027.11.2527.20

27.46.710.20.10.500027.3-0.7527.40

27.66.810.20.070.350027.50.7527.60

27.86.880.20.10.500027.748.2527.80

286.980.22.0310.150027.9-8.3028.45

309.0122.041.020029-0.2730.75

3511.0550.40.080032.5-0.0135.00

4011.4550.190.038037.50.0040.00

4511.6450.120.024042.5-0.4845.00

5011.765-11.76-2.352047.5


3 Titulacin:

VNaOH(mL)pHVpH1pH1/VV12pH/V2V2

04.38

54.7850.310.06202.50.005.00

105.0950.30.06007.50.0010.00

155.3950.350.070012.5-0.0115.00

205.7450.090.018017.50.0319.00

215.8310.110.110020.5-0.0921.00

225.9410.020.020021.50.1321.80

22.25.960.20.020.100022.10.2522.20

22.45.980.20.030.150022.3-0.2522.40

22.66.010.20.020.100022.50.2522.60

22.86.030.20.030.150022.7-0.2522.80

236.060.20.020.100022.90.2523.00

23.26.080.20.030.150023.10.0023.20

23.46.110.20.030.150023.30.0023.40

23.66.140.20.030.150023.50.0023.60

23.86.170.20.030.150023.70.2523.80

246.20.20.040.200023.90.0024.00

24.26.240.20.040.200024.1-0.4024.23

24.56.280.30.030.100024.351.0024.45

24.66.310.10.030.300024.55-0.3324.63

24.86.340.20.050.250024.70.0024.80

256.390.20.050.250024.9-0.5025.00

25.26.440.20.030.150025.10.5025.20

25.46.470.20.050.250025.30.5025.40

25.66.520.20.070.350025.5-0.5025.60

25.86.590.20.050.250025.70.7525.80

266.640.20.080.400025.9-0.5026.00

26.26.720.20.060.300026.10.5026.20

26.46.780.20.080.400026.31.0026.40

26.66.860.20.120.600026.5-1.0026.60

26.86.980.20.080.400026.71.5026.80

277.060.20.140.700026.91.2527.00

27.27.20.20.190.950027.12.0027.20

27.47.390.20.271.350027.35.5027.40

27.67.660.20.492.450027.51.0027.60

27.88.150.20.532.650027.711.2527.80

288.680.20.984.900027.9-7.3828.20

299.6610.470.470028.5-0.1529.00

3010.1310.320.320029.5-0.0630.00

3110.4510.260.260030.50.0631.00

3210.7110.320.320031.5-0.1532.25

3411.0320.190.095033-0.0134.00

3611.2220.140.070035-0.0136.00

3811.3620.10.0500370.0038.00

4011.4620.090.045039-0.0140.00

4211.5520.060.030041-2.9242.00

4411.612-11.61-5.805043


C) Experiencia C1. Titulacin de un cido fuerte con una base fuerte (NaOH)Volumen HCl0,1N (mL)Volumen (mL) NaOH0,0915NNormalidad del HCl (N)

1 titulacin2527,460.1005

2 titulacin2526,420.0967

3 titulacin2527,430.1004

0,0992

1 Titulacin:

2 Titulacin:

3 Titulacin:

Titulaciones:1 Titulacin:

VNaOH(mL)pHVpHpH/VV12pH/V2V2

02.07

52.175.00000.10.02002.50.005.00

102.295.00000.120.02407.50.0010.00

152.475.00000.180.036012.50.0115.00

202.795.00000.320.064017.50.0219.25

223.032.00000.240.1200210.0922.00

243.612.00000.580.2900230.2824.30

27.26.873.20003.261.018825.61.5226.45

27.47.590.20000.723.600027.37.7527.40

27.68.620.20001.035.150027.5-18.2527.60

27.88.920.20000.31.500027.7-0.5027.80

289.20.20000.281.400027.9-0.8228.45

3010.22.000010.500029-0.0930.75

3511.175.00000.970.194032.5


2 Titulacin:VNaOH(mL)pHVpHpH/VV12pH/V2V2

02.08

52.175.00000.090.01802.50.005.00

102.325.00000.150.03007.50.0010.00

152.55.00000.180.036012.50.0115.00

202.825.00000.320.064017.50.0219.25

223.072.00000.250.1250210.0621.75

233.291.00000.220.220022.50.1923.00

243.71.00000.410.410023.50.4824.50

277.813.00004.111.370025.51.6426.30

27.28.610.20000.84.000027.1-10.7527.20

27.48.980.20000.371.850027.3-3.0027.45

27.89.360.40000.380.950027.6-1.0027.75

289.490.20000.130.650027.9-0.2128.45

3010.322.00000.830.415029-0.0730.75

3511.125.00000.80.160032.5-0.0235.00

4011.415.00000.290.058037.5


3 Titulacin:VNaOH(mL)pHVpHpH/VV12pH/V2V2

02.03

52.125.00000.090.01802.50.005.00

102.245.00000.120.02407.50.0010.00

152.415.00000.170.034012.50.0015.00

202.685.00000.270.054017.50.0220.00

253.495.00000.810.162022.50.1823.88

25.53.820.50000.330.660025.253.6825.50

265.070.50001.252.500025.75-0.4826.38

288.882.00003.811.905027-0.6227.75

299.861.00000.980.980028.5-0.5329.00

3010.311.00000.450.450029.5-0.0931.00

3511.175.00000.860.172032.5-0.0235.00

4011.455.00000.280.056037.5


D) Experiencia D:

1. Determinacin de la acidez de un vinagre comercial con NaOH 0,0915N estandarizado.Volumen Vinagre (mL)Volumen (mL) NaOH (0,0915N)%W/V

1 titulacin19,785,37



5,60

1 Titulacin:

2 Titulacin:

3 Titulacin:

1 Titulacin:


04.06

24.412.00000.350.175010.002.00

44.752.00000.340.170030.004.00

65.12.00000.350.175050.045.75

75.341.00000.240.24006.50.097.00

85.671.00000.330.33007.50.208.00

96.21.00000.530.53008.51.208.80

9.26.450.20000.251.25009.11.879.30

9.87.650.60001.22.00009.50.779.83

10.59.40.70001.752.500010.15-2.6010.45

119.870.50000.470.940010.75-0.5511.13

1210.41.00000.530.530011.5-0.1712.25

1410.942.00000.540.270013-0.0714.00

1611.22.00000.260.130015


2 Titulacin:


03.65

24.182.00000.530.26501-0.042.00

44.542.00000.360.180030.004.00

64.892.00000.350.175050.015.75

75.081.00000.190.19006.50.047.00

85.311.00000.230.23007.50.178.00

95.711.00000.40.40008.50.368.85

9.45.970.40000.260.65009.20.679.35

9.66.140.20000.170.85009.52.009.60

9.86.390.20000.251.25009.74.259.80

106.810.20000.422.10009.96.5010.00

10.27.490.20000.683.400010.1-0.1710.30

10.89.490.600023.333310.5-4.4610.70

119.80.20000.311.550010.9-1.5711.20

1210.411.00000.610.610011.5-0.2612.25

1410.862.00000.450.225013-0.0514.00

1611.092.00000.230.115015


3 Titulacin:


03.65

24.172.00000.520.26001-0.042.00

44.532.00000.360.18003-0.014.00

64.872.00000.340.170050.035.75

75.091.00000.220.22006.50.027.00

85.331.00000.240.24007.50.158.00

95.721.00000.390.39008.50.238.85

9.45.940.40000.220.55009.21.479.45

106.710.60000.771.28339.77.179.90

10.27.540.20000.834.150010.1-1.4210.25

10.69.030.40001.493.725010.4-3.5810.55

10.89.560.20000.532.650010.7-6.0010.80

119.850.20000.291.450010.9-1.3211.20

1210.511.00000.660.660011.5-0.2912.25

1410.972.00000.460.230013-0.0614.00

1611.212.00000.240.120015


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