a) State TWO characteristics of anhydrous sodium carbonate to allows it to be used as a primary standard
Answers
The two characteristics of anhydrous sodium carbonate that allows it to be used as a primary standard are
High stability (low reactivity) so it is highly stable
It can be Obtained in high purity - and that too without much effort
Detailed answer
To better understand this let us understand the criteria for an acid or base to be considered as a primary standard
Only those acids or bases are considered primary standards which are stable and hence their strength does not change with time.
Now let us consider the case of anhydrous sodium carbonate
The strength of sodium carbonate does not change hence it is considered as a primary standard. sodium chloride is used as the primary standard because its molarity remains constant for a long period of time.
Additional points(Characteristics)
- It is cheap and readily available
- it is nontoxic
- it is 99% pure
Extra info
The chemical name of anhydrous sodium carbonate is Na2CO3
Answer:
High purity
Non- toxicity
Explanation: