Practicals Flashcards
If a spot doesn’t move, what does this tell you about the ink? - Chromatography
Insoluble
Why do we ensure the water level is not higher than the start line? - Chromatography
So it can allow water to run up the paper
Why do we use pencils to draw the line? - Chromatography
Because pencils insoluble
What is the name of the piece of equipment which cools any vapour made during distillation & turns it into a liquid? - Distillation
Condensor
In the distillation ink from water, which piece of equipment helps you know you have produced pure water? - Distillation
Thermometer
Name the piece of equipment used for measuring out a volume of acid? - Investigating neutralisation
-Pipette
-Measuring cylinder
Name the piece of equipment used for measuring out a mass of solid powder to add to the acids. - Investigating neutralisation
Scales
What colour does the universal indicator paper turn when you have reached neutral? - Investigating neutralisation
Green
Which piece of equipment should we use to measure PH that is more accurate then universal indicator paper? - Investigating neutralisation
PH meter
Why is a string rod used during this experiment? - Investigating neutralisation
To ensure the solid dissolves
How was it clear a chemical reaction had taken place? - Copper sulfate
Colour change
Name the piece of equipment used for measuring out a mass of solid powder to add to the acid? - Copper sulfate
Scales
Why was excess copper oxide added to the acid? - Copper sulfate
Makes sure all the acids reacted
How were dry solids copper sulfate crystal formed? - Copper sulfate
-Filter the excess
-Heat it to remove spare water
-Pour onto crystallisation disk
What is the name of the process when removing the excess copper oxide? - Copper sulfate
Filtration
