Chemistry
WAEC 2019
The properties of a good primary standard solution include the following except?
-
A.
High molecular mass
-
B.
low molecular mass
-
C.
high degree of purity
-
D.
readily available
Correct Answer: Option B
Explanation
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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