Chemical Analysis Year 9 Flashcards
Name the steps for the test for oxygen
1) Put glowing splint in gas container
2) If oxygen is present the splint will relight
Name the steps for the test for carbon dioxide
1) Bubble substance through limewater
2) If carbon dioxide is present, limewater will turn cloudy white
Name the steps for the test for chlorine
1) Dampen blue litmus paper with a drop of tap water
2) Hold paper near container of substance
3) If chlorine is present, paper will turn red and then white
What is an aqueous solution?
Solution formed when substance dissolves in water
Name the steps for the test for positive and negative ions
1) Add sodium hydroxide solution to metal salt solution and stir
2) A colour change will happen
These are the colour changes and their metals in the ions test
Copper-Blue
Iron(II)-Green
Iron(III)-Brown
Calcium-White
Name the steps for the test for carbonate
1) Add drops of HCl to sample
2) If carbonate is present, carbon dioxide will be released, producing bubbles
Name the steps for the test for sulphate
1) Add drops of HCl to sample
2) Add barium chloride solution to sample
3) If sulphate is present, a white precipitate of barium sulphate will be formed
Name the steps for the test for halides
1) Add drops of nitric acid to sample
2) Add silver nitrate solution to sample
3) If halide is present then white precipitate of silver halide is formed
Name the steps for a flame test
1) Dip a nichrome wire loop into solution
2) Use handle to hold loop in edge of roaring blue flame
3) A colour change will happen
Name the colour changes and their metals for a flame test
Lithium-Red
Sodium-Yellow
Potassium-Lilac
Calcium-Orange-red
Copper-Green-blue
What happens when using an instrument method of analysis?
A machine carries out the analysis of a substance
What are the advantage of an instrument method of analysis?
Instruments can analyse small amounts of substances, they are very accurate, and are quick and can run all the time
What is infrared spectrometry?
An analytical technique used to identify and study chemical compounds based on how they interact with infrared light
Name uses of infrared spectrometry
Identify chemical compounds, monitor chemical reactions,
What is the IR spectrum?
Graph that shows how much wavelength is absorbed by sample
What is mass spectrometry?
An analytical technique used to measure the mass of molecules and atoms
Name uses of mass spectrometry
Measure atom or molecule mass, identify unknown compounds, detect toxic substances in environmental science
