# Chemical Analysis test questions

### 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 $$0.3 moll^{-1}H_{2}SO_{4}$$