prov:value
| - Specifically, a hydroxide such as sodium hydroxide, potassium hydroxide, lithium hydroxide or ammonium hydroxide; an alkali metal inorganic acid salt such as sodium carbonate, sodium hydrogencarbonate, potassium carbonate, lithium carbonate, sodium phosphate, potassium phosphate, lithium phosphate, potassium dihydrogenphosphate or disodium hydrogenphosphate; an alkali metal organic acid salt such
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