Paper 6 Pt 2 Flashcards
How would rusting be faster
If pure oxygen was used rather than air
How to speed up the drying process
Use a fan or by increasing temp or tv using a hair dryer. NOT a catalyst
Condenser
To change steam into water
How to check the purity for a collected solvent
Test it’s melting or boiling point
When heated what color is hydrated copper sulphate
Turn from blue to white upon heating
Saturated
No more solute can be dissolved in a solvent at a constant temp
An excess amount of reactant is used..
To make sure all the other reactant will be used
Why are crystals sometimes dried using filter paper instead of heating?
To prevent complete loss of water from crystals and to prevent them from breaking
How could you know which reactant is in excess?
At the end of the reaction the excess reactant will be visible
When lead bromine is used
Use a fume cupboard or use goggles, lab coats, gloves bc it’s toxic
How would you separate two different solutions with different boiling points?
Fractional distillation
Physical test for water
Heat, it will boil at 100 degrees or heat it and melt at 0 degrees
Why should a water bath be used to heat alcohol?
Fire would be produced if alcohol is touched with lighted splint. Lagging or cloth can be used to control temperature for accurate results
Excess
In reacted reactant
More than what is needed
Why is grass ground with ethanol rather than water
Chlorophyll is more soluble in ethanol
