Researching Chemistry Flashcards
1
Q
What is a primary standard
A
A substance from which a standard solution can be directly prepared from
2
Q
A primary standard has to be …
A
Stable when solid and liquid
Soluble in water
3
Q
When the colour changes in a titration this is called ….
A
The end point
4
Q
The point in a titration where the colour change is observed
A
End point
5
Q
The point in a titration where the reaction is actually finished
A
The equivalence point
6
Q
What is a molecular ion
A
A whole molecule which has lost one electron so gives the molecular mass of the compound
7
Q
IR - the greater the mass of the atoms the ….
A
Lower the frequency of the vibrations
8
Q
IR - the stronger the bond ….
A
The higher the frequency of the vibrations
9
Q
NMR - low energy hydrogen atoms align themselves ….. the field
A
With
