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 nam... 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 ● in the structure of diamond represents a carbon atom. 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 name of 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 is calculated using the formula:
Rf=distance moved by solventdistance moved by dye
For this question, the dye moved 2 cm and the solvent moved 8 cm:
Rf=82=0.25
Thus, 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 of magnesium with oxygen:
Ignite the Magnesium: Place a strip of magnesium ribbon in a Bunsen burner flame to ignite it.
Reaction with Oxygen: As the magnesium burns, it reacts with oxygen in the air. The equation for the reaction is:
2Mg+O2→2MgO
Observation: The magnesium burns with a bright white flame, producing a white powder, magnesium oxide (MgO).
Bonding Explanation: Each magnesium atom has 2 electrons in its outer shell, and oxygen has 6. During the reaction, magnesium donates its two electrons to oxygen, which forms a negative ion (O²⁻).
Formation of Ionic Compound: This electron transfer leads to the formation of ionic bonds where magnesium (Mg²⁺) ion is attracted to oxygen (O²⁻), resulting in the formation of magnesium oxide.
