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preface to fifteenth edition

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8.112 SECTION 8<br />

TABLE 8.19<br />

pH Values of Biological and Other Buffers for Control Purposes (Continued)<br />

x mL of0.2M NaOH Added <strong>to</strong> 100 mL ofS<strong>to</strong>ck Solution<br />

(0.04M Acetic Acid, 0.04M H 3 PO 4 , and 0.04M Boric Acid)<br />

pH NaOH, mL pH NaOH, mL pH NaOH, mL pH NaOH, mL<br />

1.81 0.0 4.10 25.0 6.80 50.0 9.62 75.0<br />

1.89 2.5 4.35 27.5 7.00 52.5 9.91 77.5<br />

1.98 5.0 4.56 30.0 7.24 55.0 10.38 80.0<br />

2.09 7.5 4.78 32.5 7.54 57.5 10.88 82.5<br />

2.21 10.0 5.02 35.0 7.96 60.0 11.20 85.0<br />

2.36 12.5 5.33 37.5 8.36 62.5 11.40 87.5<br />

2.56 15.0 5.72 40.0 8.69 65.0 11.58 90.0<br />

2.87 17.5 6.09 42.5 8.95 67.5 11.70 92.5<br />

3.29 20.0 6.37 45.0 9.15 70.0 11.82 95.0<br />

3.78 22.5 6.59 47.5 9.37 72.5 11.92 97.5<br />

x mL of0.1M HCl plus<br />

y mL of0.1M Glycine<br />

(7.505 g Glycine <br />

5.85 g NaCl per Liter)<br />

x mL of0.1M HCl plus y mL<br />

of0.1M Citrate (21.008 g<br />

Citric Acid Monohydrate <br />

200 ml 1M NaOH per Liter)<br />

x mL of0.05M Succinic Acid<br />

1<br />

(5.90 g · L ) plus y mL of<br />

Borax Solution (19.404 g<br />

Na 2 B 4 O 7 · 10H 2 O per Liter)<br />

pH<br />

HCl,<br />

mL<br />

Glycine,<br />

mL<br />

pH<br />

HCl,<br />

mL<br />

Citrate,<br />

mL<br />

pH<br />

Succinic<br />

Acid, mL<br />

Borax,<br />

mL<br />

1.20 84.0 16.0 3.50 52.8 47.2 3.60 90.5 9.5<br />

1.40 71.0 29.0 3.60 51.3 48.7 3.80 86.3 13.7<br />

1.60 61.8 38.2 3.80 48.6 51.4 4.00 82.2 17.8<br />

1.80 55.2 44.8 4.00 43.8 56.2 4.20 77.8 22.2<br />

2.00 49.1 50.9 4.20 38.6 61.4 4.40 73.8 26.2<br />

2.20 42.7 57.3 4.40 34.6 65.4 4.60 70.0 30.0<br />

2.40 36.5 63.5 4.60 24.3 75.7 4.80 66.5 33.5<br />

2.60 30.3 69.7 4.80 11.0 89.0 5.00 63.2 36.8<br />

2.80 24.0 76.0 5.20 60.5 39.5<br />

3.00 17.8 82.2 5.40 57.9 42.1<br />

3.30 10.8 89.2 5.60 55.7 44.3<br />

3.60 6.0 94.0 5.80 54.0 46.0<br />

1<br />

x mL of0.2M Na 2 HPO 4 ·2H 2 O (35.599 g · L ) plus<br />

1<br />

y mL of0.1M Citric Acid (19.213 g · L )<br />

pH<br />

Na 2 HPO 4 ,<br />

mL<br />

Citric<br />

Acid, mL<br />

pH<br />

Na 2 HPO 4 ,<br />

mL<br />

Citric<br />

Acid, mL<br />

pH<br />

Na 2 HPO 4 ,<br />

mL<br />

Citric<br />

Acid, mL<br />

2.20 2.00 98.00 4.20 41.40 58.60 6.20 66.10 33.90<br />

2.40 6.20 93.80 4.40 44.10 55.90 6.40 69.25 30.75<br />

2.60 10.90 89.10 4.60 46.75 53.25 6.60 72.75 27.25<br />

2.80 15.85 84.15 4.80 49.30 50.70 6.80 77.25 22.75<br />

3.00 20.55 79.45 5.00 51.50 48.50 7.00 82.35 17.65<br />

3.20 24.70 75.30 5.20 53.60 46.40 7.20 86.95 13.05<br />

3.40 28.50 71.50 5.40 55.75 44.25 7.40 90.85 9.15<br />

3.60 32.20 67.80 5.60 58.00 42.00 7.60 93.65 6.35<br />

3.80 35.50 64.50 5.80 60.45 39.55 7.80 95.75 4.25<br />

4.00 38.55 61.45 6.00 63.15 36.85 8.00 97.25 2.75

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