Qualitative Analysis

When an excess of NH₃ (aq) was added to another sample of the colourless solution, a white ppt was observed to dissolve. What cations could be present in the colourless solution?

• Zn²⁺

• Ca²⁺

• Al³⁺

• Fe³⁺

Tags

NGSS.MS-PS1-2

Name the gas present.

• oxygen

• hydrogen

• ammonia

• sulfur dioxide

Tags

NGSS.MS-PS1-2

Sodium hydroxide and ammonia were added to an unknown substance X. The results are as shown. Name the cation present.

Tags

NGSS.MS-PS1-2

Aqueous sodium hydroxide and aluminium were added to the unknown solution. The mixture was then warmed and the gas tested. The result is shown in the picture. This is the test for

• ammonium.

• lead.

• carbonate.

• nitrate.

Tags

NGSS.MS-PS1-2

Damp blue litmus is bleached. This shows the presence of

• carbon dioxide.

• chlorine.

• sulfur dioxide,

• oxygen

Tags

NGSS.MS-PS1-2

Name the precipitate in A.

Tags

NGSS.MS-PS1-2

Name the precipitate in B.

Tags

NGSS.MS-PS1-2

A dropper pipette was used to remove the gas evolved. This was then bubbled into limewater. Name the gas tested.

Tags

NGSS.MS-PS1-2

When the gas was bubbled into the limewater, white ppt formed. Name the white ppt.

Tags

NGSS.MS-PS1-2

Dilute nitric acid was added to an unknown salt, followed by aqueous silver nitrate. The result is as seen in test tube A. Name the precipitate formed.

Tags

NGSS.MS-PS1-2