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WAEC Chemistry 2019 Paper
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© africaexams.com
Question : 16
Total: 50
The properties of a good primary standard solution include the following except?
High molecular mass
low molecular mass
high degree of purity
readily available
Validate
Solution:
Properties of a good standard solution
High purity.
Stability (low reactivity)
Low hygroscopicity (to minimize weight changes due to humidity)
High equivalent weight (to minimize weighing errors)
Non-toxicity.
Ready and cheap availability.
High molecular mass
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