C4 Flashcards
What is the moles equation?
Moles= mass(g) divided by RAM
How many moles are in 10g of H2?
5
How much mass(g) is in 1 mole of H2
2g
What is the percentage yield equation?
Percentage yeild= (mass of product produced divided by theoretical mass) X100
What is the atom economy equation?
Atom economy= (atomic mass of desired product divided by atomic mass of reactants) X100
Name 2 factors that effect yeild of chemical reaction?
Product left behind in apparatus and reversible reactions not going to completion
Why is it important to maximise atom economy in Industrial processes?
To conserve the earth rescources and minimise pollution
What is concentration measured in?
Grams per decimetres cubed
How do you get from cm to dm?
Divided by 1000
What is the concentration equation?
Concetration = mass or moles divided by volumes
What is titrations used for?
To measure what volumes of acid and alkali react together completely
What is the end point of a reaction?
The point when the reaction between an acid and alkali is complete
What do u use to show the end point of a reaction?
An acid/base indicator
What can you use a titration calculation for?
Find the unknown concentration of a solution
What are the 5 steps to a titration calculation?
1- convert cm to dm
2- c X v = moles
3- ratio
4- c= m/v
5- result
