Answer to Question #349187 in General Chemistry for Cam

Question

What properties must a compound have to make it suitable for use as a primary standard?

Answer 1

Features of a primary standard include:

• 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.