The student measures $25.0\text{ cm}^3$ of aqueous ammonia into a conical flask. Write down the letter for the apparatus she should use to measure the aqueous ammonia. Give the name of this apparatus.
State the name of this apparatus.
State the colour of methyl orange indicator in: • aqueous ammonia • dilute sulfuric acid?
At the end-point the student notes that $12.5\text{ cm}^3$ of $0.100\text{ mol dm}^{-3}$ sulfuric acid has neutralised $25.0\text{ cm}^3$ of $0.100\text{ mol dm}^{-3}$ ammonia. Devise an experiment to prepare a pure sample of ammonium sulfate crystals. You should use: • $0.100\text{ mol dm}^{-3}$ sulfuric acid • $0.100\text{ mol dm}^{-3}$ ammonia • the apparatus normally found in a chemistry laboratory.
What is the volume of gas in the gas syringe?
After the gas has been gathered, damp blue litmus paper and damp red litmus paper are placed in the gas. What happens to the colour of: • the damp blue litmus paper • the damp red litmus paper?