Past paper error revision Flashcards
1
Q
Explain what is meant by the term weighted mean mass
A
The average mass taking into account the relative abundance of the isotopes
2
Q
State two ways that the use of catalyst helps chemical companies to make their processes more sustainable and less harmful to the environment
A
Less fossil fuel burnt
Lower temperature used
3
Q
How does conjugate base pair work with Ka
A
Higher Ka value means more acidic so acts as acid
Lower ka value means less acidic so acts as base
4
Q
Explain why the student uses a large excess of methanol in the experiment -1st order reaction
A
To keep methanol in zero order/constant
