This question is about iron. The list shows the properties of some elements. - act as catalysts - have low densities - have low melting points - form acidic or basic oxides - form coloured compounds - form positive or negative ions Iron is a transition metal. Sodium is a Group I metal. State which property from the list: (i) is true for sodium but not iron ................................................................................................................................... (ii) is true for iron but not sodium ................................................................................................................................... 1] (iii) is true for both sodium and iron ................................................................................................................................... (iv) is not true for sodium and not true for iron. ...................................................................................................................................

Chemistry

IGCSE&ALevel

CAIE

Exam No：0620_s24_qp_43 Year：2024 Question No：6(b)

Answer:

Knowledge points:

7.3.1.1. an alkali by titration

7.3.1.2. excess metal

7.3.1.3. excess insoluble base

7.3.1.4. excess insoluble carbonate

7.3.2.1. sodium, potassium and ammonium salts are soluble

7.3.2.2. nitrates are soluble

7.3.2.3. chlorides are soluble, except lead and silver

7.3.2.4. sulfates are soluble, except barium, calcium and lead

7.3.2.5. carbonates are insoluble, except sodium, potassium and ammonium

7.3.2.6. hydroxides are insoluble, except sodium, potassium, ammonium and calcium (partially)

7.3.3. Define a hydrated substance as a substance that is chemically combined with water and an anhydrous substance as a substance containing no water

7.3.4. Describe the preparation of insoluble salts by precipitation

7.3.5. Define the term water of crystallisation as the water molecules present in hydrated crystals

Answer:

Knowledge points:

Solution:

Related Question