Lesson Worksheet: Identifying Salts Chemistry
In this worksheet, we will practice identifying salts via combinations of qualitative analyses, including flame, precipitation, and reactivity tests.
Q1:
A compound X contains atoms or ions of a metallic element A and a nonmetallic element B. An aqueous solution of X is tested as shown.
What is the symbol of the element A?
- A
- B
- C
- D
- E
What is the symbol of the element B?
- A
- B
- C
- D
- E
What is observed if a piece of copper metal is added to a solution of X?
- AA grey solid precipitates.
- BA blue solution forms and a brown solid precipitates.
- CA blue solution forms and a grey solid precipitates.
- DA blue solution forms.
- ENo changes are observed.
What is observed if chlorine water is added to a solution of X?
- AA brown solution forms, a black solid precipitates, and a purple vapor is evolved.
- BThe reaction produces a colorless gas, which creates a pop when ignited with a lit splint.
- CNo changes are observed.
- DA red-brown solution forms.
- EThe reaction produces a colorless gas, which can relight a glowing splint.
Q2:
A colorless aqueous solution of a salt is tested as shown.
Give the symbol of the metallic element in the salt.
- A
- B
- C
- D
- E
Give the chemical symbol of the anion in the salt.
- A
- B
- C
- D
- E
Q3:
When a solid material is added to a dilute aqueous solution , an exothermic reaction takes place and a gas is produced. A number of possible observations are shown in the table.
| Observation | Precipitate | Gas Test with a Lit Splint | Gas Test with Limewater |
|---|---|---|---|
| 1 | White | Popping sound | No change |
| 2 | None | Extinguishes flame | Cloudy solution |
| 3 | None | Intensifies flame | No change |
| 4 | White | Extinguishes flame | Cloudy solution |
| 5 | None | Popping sound | No change |
Which set of observations would be made if and ?
Which set of observations would be made if and ?
For and , a solution of compound produces different sets of observations. Which of the following is a possible formula for compound ?
- A
- B
- C
- D
- E
Q4:
Different nitrate salts are added separately to dilute aqueous solutions of five sodium salts. The results of these tests are shown in the table.
| Sodium Salt | ||||
|---|---|---|---|---|
| 1 | White solid | White solid | Solution | Solution |
| 2 | White solid | White solid | White solid | White solid |
| 3 | Yellow solid | Yellow solid | Solution | Solution |
| 4 | Solution | White solid | Solution | White solid |
| 5 | Brown solid | White solid | White solid | Solution |
Which sodium salts contain halide ions?
- A1 and 3
- B2 and 5
- C1 and 4
- D4 only
- E3 only
Which sodium salts form aqueous solutions that turn red litmus paper blue?
- A2 only
- B1, 3, and 5
- C4 only
- D2 and 5
- E1 and 4
Which sodium salt reacts with nitric acid to produce a colorless gas?
Which sodium salt has the smallest molar mass?
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