Sodium sulfate is an ionic solid which is soluble in water - Edexcel - GCSE Chemistry - Question 2 - 2016 - Paper 1
Question 2
Sodium sulfate is an ionic solid which is soluble in water.
(a) Which row of the table shows the likely properties of sodium sulfate?
Put a cross (X) in the box to ... show full transcript
Worked Solution & Example Answer:Sodium sulfate is an ionic solid which is soluble in water - Edexcel - GCSE Chemistry - Question 2 - 2016 - Paper 1
Step 1
Which row of the table shows the likely properties of sodium sulfate?
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
The correct row is C. This is because sodium sulfate is an ionic solid with a high melting point of 884 °C, and it conducts electricity when dissolved in water due to the presence of freely moving ions.
Step 2
Complete the sentence by putting a cross (X) in the box next to your answer.
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 correct answer is A: NaSO₄. This is the chemical formula for sodium sulfate, indicating it consists of one sodium ion and one sulfate ion.
Step 3
Which colour in the flame shows the presence of sodium ions?
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 correct answer is C: orange-red. Sodium ions produce a bright yellow flame, which is commonly referred to as orange-red in flame tests.
