AQA A-Level Chemistry Past Paper – Verified Questions & Worked Solutions

AQA A-LEVEL CHEMISTRY PAST PAPER
QUESTIONS PAPER AND WORKED SOLUTIONS
[VERIFIED]

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. - correct 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)


a covalent bond (a shared pair of electrons) in which both electrons come
from the same atom. - correct answer - Describe what is meant by
"Dative Covalent" bonding(1)