[MK18a] (was (MK18) + HCl): clear light pink liq.

[MK18b] (was (MK18) + HCl + Na2S2O5): clear pink liq.

[MK18c] (was (MK18) + Na2S2O5): clear pink liq + white ppt (CaSO4?).

Merged supernats of [MK18a] [MK18b] [MK18c] into (MK17).

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(MK18) (was cobalt hydroxide ppt filtered from MK14): greenish dark gray powder (with fibers?). Resuspended in H2O. Merged with (MK2p) (dark olive brown ppt). Added 10 mL HCl 20%.  Result was black suspension. After 10 hours, separated into dark red liq, pH 4, and black ppt.

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Collected alldirty filter papers in erlen (MK23). Covered with H2O + 10 mL HCl 20%. Some bubbling. After 10 h, light clear pink liq, pH 1.0-1.5.

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