What colour flame is produced when a sample containing copper ions undergoes a flame test?
green
What colour flame is produced when a sample containing sodium ions undergoes a flame test?
yellow
What colour flame is produced when a sample containing potassium ions undergoes a flame test?
lilac
What colour flame is produced when a sample containing lithium ions undergoes a flame test?
crimson
What colour flame is produced when a sample containing calcium ions undergoes a flame test?
orange
Name four factors that affect the rate of chemical reactions.
catalyst, pressure, temperature, surface area
Give three factors you would need to take into account when calculating the carbon footprint of a car.
How all the raw materials were sourced
The manufacturing process
The total amount of fuel it will use over its lifetime
how to calculate the overall rate of a reaction?
rate of a reaction = quantity of products formed (or reactions used) / time taken
Which of the following could be units for the rate of a reaction?
cm3/s (or) g/min
Formulations are?
mixtures that have been prepared using a specific formula.
what is the test for halides?
add dilute nitric acid
add silver nitrate
chlorine turns white
bromide turns cream
iodide turns yellow
what is the test for carbonates?
add dilute hydrochloric acid to the carbonate and collect the gas produced. bubble it through limewater and if the limewater turns cloudy, carbonates are present
what is the test for sulphates?
add hydrochloric acid to a tube with your sulphate to get rid of any impurities and then add barium chloride solution to the tube. a white precipitate is formed if sulphates are present.
what is one way to describe hydrocarbons with only single bonds?
saturated
State the definition of a ‘formulation’.
A chemical mixture designed for a specific purpose.
