Um to my best knowledge I believe it is the carbonated water
The answer is b.
Hope that helps :)
moles Cu produced : 0.002
<h3>Further explanation</h3>
Concentration of copper sulfate (CuSO₄) : 0.319 g/dm³
MW CuSO₄ :

mol CuSO₄ /dm³ :

CuSO₄⇒Cu²⁺ + SO₄²⁻
mol Cu : mol CuSO₄ = 1 : 1 , so mol Cu²⁺=0.002
Hihihihihihihihihihihihihi
Hibiscus I
Hi yes
Answer: It turns blue litmus red
Explanation:
I just got it right on edge