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Complete the sentence by putting a cross (✗) in the box next to your answer - Edexcel - GCSE Chemistry - Question 6 - 2012 - Paper 1
Question 6
Complete the sentence by putting a cross (✗) in the box next to your answer. Sodium is an alkali metal. In the periodic table, sodium is in group ☐ A 0 ☐ B 1 ☐ C ... show full transcript
Worked Solution & Example Answer:Complete the sentence by putting a cross (✗) in the box next to your answer - Edexcel - GCSE Chemistry - Question 6 - 2012 - Paper 1
Step 1
Step 2
Explain how metals conduct electricity.
Answer
Metals conduct electricity due to the presence of delocalised electrons. These electrons are not bound to any specific atom and can move freely throughout the metal structure. When an electric field is applied, these electrons can move towards the positive terminal, allowing for the conduction of electric current.
Step 3
Step 4
Describe how silver nitrate solution can be used to show that solid sodium chloride contains chloride ions.
Answer
To show that solid sodium chloride contains chloride ions, first make a solution of sodium chloride. Then add dilute nitric acid, followed by silver nitrate solution. If chloride ions are present, a white precipitate of silver chloride will form.
Step 5
Describe how the reaction can be carried out, explaining what happens when a sodium atom reacts with a chlorine atom.
Answer
The reaction between sodium and chlorine can be carried out by carefully adding sodium to chlorine gas. When a sodium atom reacts with a chlorine atom, the sodium atom loses one electron to form a sodium ion, while the chlorine atom gains that electron to form a chloride ion. This process results in the formation of sodium chloride (table salt), which is an ionic compound. Sodium's tendency to lose an electron and chlorine's tendency to gain one is driven by their desire to achieve stable electronic configurations.