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pH Volume de NaOH0 2.882 3.36978875834 3.68930215966 3.88469857398 4.0298406966
10 4.147940008712 4.249397649414 4.339825534916 4.422641065618 4.500122526820 4.573908740922 4.645264649524 4.715237893725 4.7526 4.784762106328 4.854735350530 4.926091259132 4.999877473234 5.077358934436 5.160174465138 5.250602350640 5.352059991342 5.470159303444 5.615301426146 5.810697840448 6.130211241750 8.7252 11.292429823954 11.58502665256 11.752845385158 11.869666231560 11.958607314862 12.029963223464 12.089223184366 12.139661993468 12.183390497870 12.2218487496
0 10 20 30 40 50 60 70 800
2
4
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10
12
14
pH x Vol. NaOH
Volume de NaOH
pH
0 10 20 30 40 50 60 70 800
2
4
6
8
10
12
14
pH x Vol. NaOH
Volume de NaOH
pH
Vol. NaOH transferido (L) log [sal]/[ápH0 2.9
0.0005 -2 2.90.001 -1.69897 3
0.0015 -1.522879 3.10.002 -1.39794 3.2
0.0025 -1.30103 3.20.003 -1.221849 3.3
0.0035 -1.154902 3.40.004 -1.09691 3.5
0.0045 -1.045757 3.50.005 -1 3.6
0.0055 -0.958607 3.60.006 -0.920819 3.6
0.0065 -0.886057 3.60.007 -0.853872 3.7
0.0075 -0.823909 3.70.008 -0.79588 3.7
0.0085 -0.769551 3.80.009 -0.744727 3.8
0.0095 -0.721246 3.80.01 -0.69897 3.9
0.0105 -0.677781 3.90.011 -0.657577 3.9
0.0115 -0.638272 40.012 -0.619789 4
0.0125 -0.60206 40.013 -0.585027 4
0.0135 -0.568636 40.014 -0.552842 4.1
0.0145 -0.537602 4.10.015 -0.522879 4.1
0.0155 -0.508638 4.10.016 -0.49485 4.2
0.0165 -0.481486 4.20.017 -0.468521 4.2
0.0175 -0.455932 4.20.018 -0.443697 4.2
0.0185 -0.431798 4.20.019 -0.420216 4.3
0.0195 -0.408935 4.30.02 -0.39794 4.3
0.0205 -0.387216 4.30.021 -0.376751 4.3
0.0215 -0.366532 4.3
-2.5 -2 -1.5 -1 -0.5 0 0.50
1
2
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6
f(x) = 1.1488155799x + 4.7616832487R² = 0.958298817
Gráfico1. pH x log [sal]/[ácido]
log [sal]/[ácido]
pH
0.022 -0.356547 4.40.0225 -0.346787 4.4
0.023 -0.337242 4.40.0235 -0.327902 4.4
0.024 -0.318759 4.40.0245 -0.309804 4.42
0.025 -0.30103 4.440.0255 -0.29243 4.45
0.026 -0.283997 4.460.0265 -0.275724 4.48
0.027 -0.267606 4.490.0275 -0.259637 4.51
0.028 -0.251812 4.520.0285 -0.244125 4.53
0.029 -0.236572 4.540.0295 -0.229148 4.55
0.03 -0.221849 4.560.0305 -0.21467 4.58
0.031 -0.207608 4.590.0315 -0.200659 4.6
0.032 -0.19382 4.620.033 -0.180456 4.64
0.0345 -0.161151 4.680.0365 -0.136677 4.72
0.05 9.64E-017 5.08
-2.5 -2 -1.5 -1 -0.5 0 0.50
1
2
3
4
5
6
f(x) = 1.1488155799x + 4.7616832487R² = 0.958298817
Gráfico1. pH x log [sal]/[ácido]
log [sal]/[ácido]
pH
Vol. (mL) EDTA em água de poçoVol. (mL) EDTAVol. (mL) EDTA em água de rede de abastecimento12.2 0.1 5.513.4 0.2 5.311.2 0.1 5.4
12.2666666667 0.133333333 5.4
Vol. (mL) EDTA em água de rede de abastecimento
