U3-5 - Chemical Analysis
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Chemical test for hydrogen
Burns with a pop
Chemical test for oxygen
Relights a glowing splint
Chemical test for carbon dioxide
Turns limewater (from clear to) cloudy
How can you confirm if a salt has specific metal ions, e.g. lithium?
Flame test Heat sample in flame, different metal ions = different colours
Which gas turns limewater cloudy?
Carbon dioxide
Which gas relights a glowing splint?
Oxygen
Which gas burns with a pop?
Hydrogen
An insoluble metal carbonate reacts with an acid. How do you know the reaction is finished?
Effervescence (fizzing) has stopped.
Lab technique used to separate a solid from a liquid.
Filtration
Lab technique used to separate a dissolved solid from a liquid.
Evaporation
A solution of accurately known concentration
Standard solution
Complete the missing step in the procedure to make a standard solution. • …….. • Add the solution with rinsings into a volumetric flask. • Make the solution up to the mark with distilled water.
• Dissolve the solid in a small volume of water.
Name this piece of equipment
Volumetric flask
Complete the missing step in the procedure to make a standard solution. • Dissolve the solid in a small volume of water. • ….. • Make the solution up to the mark with distilled water.
2.Add the solution with rinsings into a volumetric flask.
Complete the missing step in the procedure to make a standard solution. • Dissolve the solid in a small volume of water. • Add the solution with rinsings into a volumetric flask. • …..
3.Make the solution up to the mark with distilled water.
Standard solution
A solution of accurately known concentration