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12 cards from this deck
Solution with precisely known concentration
Volumetric analysis and acid-base titrations
Stable, pure, soluble solid that can be weighed accurately for standard solutions
High purity
Minimises impact of weighing errors on precision
Shouldn't lose/gain water from air
It's hygroscopic (absorbs water vapour from air)
It's deliquescent (absorbs water to form solution)
It's efflorescent (loses water of crystallisation)
Anhydrous sodium carbonate, NaCl, potassium hydrogen phthalate
Absorbs water vapour from air
Absorbs water from air to form a solution
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