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pH for salt layers from solutions 3, 4 and 5 at<br />
two RH levels<br />
Mud/Solution no. 60 % RH 75 % RH In solution<br />
Solution 3 4.7 5.2 5.5<br />
Solution 4 2.6 4.2 4.0<br />
Solution 5 2.9 3.7 4.2<br />
<br />
<br />
<br />
Concentration and pH changes with relative humidity<br />
Qualitative measurements<br />
At 60 % RH the salt layer on the electrode appeared solid,<br />
whereas at 75 % RH it appeared liquid.<br />
Date: 2004-01-13 • Page: 14 • Hydro Aluminium
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