Electrical Conductivity of Concentrated MgSO<sub>4</sub>−H<sub>2</sub>SO<sub>4</sub>Solutions up to 250 °C
Bibliographic record
Abstract
A conductivity cell, developed previously, was employed to investigate the speciation of MgSO 4 −H 2 SO 4 solutions particularly at high temperatures. These solutions were measured from 15 to 250 °C at the equilibrium vapor pressures. The maximum measured concentrations of MgSO 4 and H 2 SO 4 were 0.30 m and 0.45 m, respectively. At 250 °C and constant H 2 SO 4 concentration, the solution conductivity drops with the increase of MgSO 4 concentration. It is postulated that this drop is caused by a decrease in the concentration of H + due to bisulfate formation. However, the limiting equivalent conductivity of H + was not significantly affected by MgSO 4 . Application of the extended mean spherical approximation (MSA) theory to the experimental data allowed the coefficients that determine the ionic strength dependence of the average effective radius to be obtained. With these coefficients, the conductivity of the MgSO 4 −H 2 SO 4 aqueous system can be reproduced up to 250 °C with an average absolute difference of 2.47%.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.003 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.003 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.004 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".