Chemical Analysis

1

Which of the following is an example of qualitative analysis?

2

Which of the following can be identified by a flame test?

3

A sample burned with a blue-green flame. Which of the following metals could be in the sample?

4

Sodium sulfate solution was added to barium chloride solution. What is the name of the precipitate formed?

5

Identify the precipitation reaction.

6

What is the mole ratio CuSO_{4}:NaOH?

CuSO_{4}+ 2NaOH\rightarrow Cu(OH)_{2}+ Na_{2}SO_{4}

7

Select the equipment that would most accurately measure 20cm^{3} of liquid.

8

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?

9

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}

10

What volume of 0.2moll^{-1}NaOH is needed to neutralise 25cm^{3} of 0.3 moll^{-1}H_{2}SO_{4}