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 machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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 source (direct Gemma or distilled Codex), 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".