Standard Solutions (Leaving Cert Chemistry): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What is a standard solution?
What is a standard solution?
A solution with precisely known concentration
What is the main use of standard solutions?
What is the main use of standard solutions?
Volumetric analysis and titrations
What is a primary standard?
What is a primary standard?
A stable, pure, soluble solid
Why must a primary standard have high purity?
Why must a primary standard have high purity?
To ensure accurate calculations
Why must a primary standard be stable in air?
Why must a primary standard be stable in air?
So it doesn't absorb or lose water
Why is high molecular mass desirable for a primary standard?
Why is high molecular mass desirable for a primary standard?
Weighing errors have minimal impact
Why can't sulphuric acid be used as a primary standard?
Why can't sulphuric acid be used as a primary standard?
It is hygroscopic
Why can't sodium hydroxide be used as a primary standard?
Why can't sodium hydroxide be used as a primary standard?
It is deliquescent
Why is hydrated sodium carbonate unsuitable as a primary standard?
Why is hydrated sodium carbonate unsuitable as a primary standard?
It is efflorescent
Why can't iodine be used as a primary standard?
Why can't iodine be used as a primary standard?
It sublimes at close to room temp
Which of these is an example of a primary standard?
Which of these is an example of a primary standard?
Anhydrous sodium carbonate
What equipment is used to prepare a standard solution to an exact volume?
What equipment is used to prepare a standard solution to an exact volume?
Volumetric flask