Year 8 revision questions (31)

1

A

B

C

D

1

A

B

C

D

1

A

B

C

D

1

A

B

C

D

1

Note: metals above hydrogen in the reactivity series will not react with acids.
Note: The oxides of metals below carbon in the reactivity series will be displaced by carbon.

A

B

C

D

1

A

B

C

D

1

A

B

C

D

1

A

B

C

D

1

A

B

C

D

1

A

B

C

D

1

A

B

C

D

1

null

Method

1. Put 5cm³ of dilute HCl in three different

2. add the metal samples to the HCl

3. Note the rate of

Control variables

same concentration

volume of hydrochloric acid

same mass of metal (we will look into this further in Year 10)

same particle size of metal

same temperature of acid

Results

no bubbles for

magnesium bubbles than iron

Reactivity series from least to most reactive is

Least reactive Most reactive

Drugi mogući odgovor:

test tubes

Cu

bubbling

Fe

more vigorously

Mg

copper

1

A

B

C

D

1

Note two compounds would neutralise the acid but the question ask for the best!

A

B

C

D

1

A

B

C

D

1

A

B

C

D

1

0 cm³

25 cm³

26 cm³

50 cm³

1

null

From 0-26 cm³ the pH decreases

at 26 cm3 the pH decreases

From 26 - 50 cm³ the pH decreases

Drugi mogući odgovor:

rapidly

slowly

4

Select the cells where there should be a tick

2

Drugi mogući odgovor:

Fe

Co

Ca

Ce

1

Drugi mogući odgovor:

Ni

Cu

Be

Fe

1

null

1

null

2

null

Barium hydroxide + hydrochloric acid --> +

2

null

use a splint

Positive result =

Drugi mogući odgovor:

splint relights

glowing

lit

Squeaky pop sound

Year 8 revision questions (31)

Note: metals above hydrogen in the reactivity series will not react with acids.Note: The oxides of metals below carbon in the reactivity series will be displaced by carbon.

Note two compounds would neutralise the acid but the question ask for the best!

Select the cells where there should be a tick

Note: metals above hydrogen in the reactivity series will not react with acids.Note: The oxides of metals below carbon in the reactivity series will be displaced by carbon.

Note two compounds would neutralise the acid but the question ask for the best!

Select the cells where there should be a tick

Note: metals above hydrogen in the reactivity series will not react with acids.
Note: The oxides of metals below carbon in the reactivity series will be displaced by carbon.

Note: metals above hydrogen in the reactivity series will not react with acids.
Note: The oxides of metals below carbon in the reactivity series will be displaced by carbon.