AQA A-Level Chemistry Questions.
The sample is bombarded with high energy electrons and knocks out an electron forming 1+ rubidium
ions through using an electron gun. - Answer-Explain how the gaseous atoms of rubidium are ionized in
a mass spectrometer(2)
Rb(g)---Rb+(g)+e(-) - Answer-Write an equation, including state symbols, to show the process that occurs
when the first ionization energy of rubidium is measured(1
1) Shake the final solution in the flask.
2)Ensure the bottom of the (liquid)meniscus is on the graduation mark.
3)Wash the wet rod into the flask. - Answer-Read the following instructions that describe how to make
up a standard solution of a solid in a volumetric flask.
Answer the questions which follow.
"Take a clean 250cm3 volumetric flask. Use the balance provided and a clean, dry container, to weigh
out the amount of solid required.
Tip the solid into a clean, dry 250cm3 beaker and add about 100cm3 of distilled water.
Use a stirring rod to help the solid dissolve, carefully breaking up any lumps of slid with the rod.
When the solid has dissolved, pour the solution into the flask using a filter funnel.
Add water to the flask until the level rises to the graduation mark"
SUGGEST THREE FURTHER INSTRUCTIONS WHICH WOULD IMPROVE THE OVERALL TECHNIQUE IN THIS
ACCOUNT.(3)
Cu2(OH)2CO3+4HCL---2CuCl2+3H20+CO2 - Answer-Compounds containing Cu2+, OH- and CO3(2-) ions
are sometimes described as basic copper carbonates
The sample is bombarded with high energy electrons and knocks out an electron forming 1+ rubidium
ions through using an electron gun. - Answer-Explain how the gaseous atoms of rubidium are ionized in
a mass spectrometer(2)
Rb(g)---Rb+(g)+e(-) - Answer-Write an equation, including state symbols, to show the process that occurs
when the first ionization energy of rubidium is measured(1
1) Shake the final solution in the flask.
2)Ensure the bottom of the (liquid)meniscus is on the graduation mark.
3)Wash the wet rod into the flask. - Answer-Read the following instructions that describe how to make
up a standard solution of a solid in a volumetric flask.
Answer the questions which follow.
"Take a clean 250cm3 volumetric flask. Use the balance provided and a clean, dry container, to weigh
out the amount of solid required.
Tip the solid into a clean, dry 250cm3 beaker and add about 100cm3 of distilled water.
Use a stirring rod to help the solid dissolve, carefully breaking up any lumps of slid with the rod.
When the solid has dissolved, pour the solution into the flask using a filter funnel.
Add water to the flask until the level rises to the graduation mark"
SUGGEST THREE FURTHER INSTRUCTIONS WHICH WOULD IMPROVE THE OVERALL TECHNIQUE IN THIS
ACCOUNT.(3)
Cu2(OH)2CO3+4HCL---2CuCl2+3H20+CO2 - Answer-Compounds containing Cu2+, OH- and CO3(2-) ions
are sometimes described as basic copper carbonates
