Which of the following is an example of qualitative analysis?
Titration
Flame testing
Filtration
Which of the following can be identified by a flame test?
Potassium
Argon
Chlorine
A sample burned with a blue-green flame. Which of the following metals could be in the sample?
Calcium
Copper
Sodium sulfate solution was added to barium chloride solution. What is the name of the precipitate formed?
Sodium chloride
Barium sulfate
Sodium chlorosulfate
Identify the precipitation reaction.
\[HC1\left ( aq \right )+ CuO\left ( s \right )\]
\[LiC1\left ( aq \right )+ Mg\left ( NO_{3} \right )_{2}\left ( aq \right )\]
\[KI\left ( aq \right )+ Pb\left ( NO_{3} \right )_{2}\left ( aq \right )\]
What is the mole ratio \(CuSO_{4}:NaOH\)?
\[CuSO_{4}+ 2NaOH\rightarrow Cu(OH)_{2}+ Na_{2}SO_{4}\]
1:2
2:1
1:1
Select the equipment that would most accurately measure \(20cm^{3}\) of liquid.
Measuring cylinder
Conical flask
Pipette
A student got the following results for a titration:
\[20.9\, cm^{3}\,(rough)\]
\[19.9\,cm^{3}\]
\[19.8\,cm^{3}\]
What was the average titre?
\[20.2cm^{3}\]
\[19.85cm^{3}\]
\[20.0cm^{3}\]
What mass of precipitate could be made when 159.5 g of copper sulfate reacts with excess sodium hydroxide?
\[CuSO_{4}+ 2NaOH\rightarrow Cu(OH)_{2}+Na_{2}SO_{4}\]
159.5g
142g
97.5g
What volume of \(0.2moll^{-1}NaOH\) is needed to neutralise \(25cm^{3}\) of \(0.3 moll^{-1}H_{2}SO_{4}\)
\[37.5cm^{3}\]
\[75cm^{3}\]
\[50cm^{3}\]