5 (a) The diagram shows the structure of diamond - Edexcel - GCSE Chemistry - Question 5 - 2014 - Paper 1
Question 5
5 (a) The diagram shows the structure of diamond.
(i) Describe what each ● represents.
(ii) State the type of bonding in the diamond structure.
(b) Give the name ... show full transcript
Worked Solution & Example Answer:5 (a) The diagram shows the structure of diamond - Edexcel - GCSE Chemistry - Question 5 - 2014 - Paper 1
Step 1
Describe what each ● represents.
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Each ● represents a carbon atom in the diamond structure. In diamond, each carbon atom is tetrahedrally bonded to four other carbon atoms, forming a strong three-dimensional lattice.
Step 2
State the type of bonding in the diamond structure.
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The type of bonding in the diamond structure is covalent bonding.
Step 3
Give the name of the process used to obtain oxygen from liquid air.
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The process used to obtain oxygen from liquid air is fractional distillation.
Step 4
What is the Rf value of this dye?
98%
120 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The Rf value can be calculated using the formula:
Rf=Distance moved by the solventDistance moved by the dye
Substituting the given values:
Rf=8 cm2 cm=0.25
Therefore, the correct answer is A. 0.25.
Step 5
Describe how the reaction can be carried out, including an explanation of what happens to the magnesium and oxygen atoms when they form magnesium oxide.
97%
117 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
To carry out the reaction, magnesium ribbon can be ignited in a Bunsen flame. This involves the following steps:
Ignition: Place the magnesium ribbon in a crucible and heat it with a Bunsen burner.
Reaction with Oxygen: As magnesium burns, it reacts with oxygen from the air.
Formation of Magnesium Oxide: The magnesium atoms each lose two electrons to form magnesium ions with a charge of +2. Oxygen atoms, having six electrons in their outer shell, gain two electrons to become oxide ions with a charge of -2.
Ionic Bonding: The oppositely charged magnesium ions and oxide ions attract each other, resulting in the formation of magnesium oxide (MgO), a solid ionic compound.
The product appears as a bright white ash, indicating the formation of magnesium oxide.
