Ow many coulombs of charge are needed to produce 35.2 mol of solid zinc?
2 answers:
Answer:
6.79 × 10⁶ c
Explanation:
Zn can be produced from the electrolysis of an aqueous solution of a Zn salt. The reduction reaction is:
Zn²⁺(aq) + 2 e⁻ → Zn(s)
We can establish the following relations.
- 1 mol of Zn is produced when 2 moles of e⁻ are gained.
- 1 mole of e⁻ has a charge of 96468 c (Faraday's constant).
The charge needed to produce 35.2 mol of Zn is:
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Answer:
The true statements are:
The solution is acidic
The pH of the solution is 14.00 - 10.53.
Explanation:
The pH of the solution is defined as negative logarithm of hydrogen ion concentration present in the solution .
- The pH value more 7 means that hydrogen ion concentration is less ,alkaline will be the solution.
- The pH value less 7 means that hydrogen ion concentration is more ,acidic will be the solution.
- The pH value equal to 7 indicates that the solution is neutral.
The pOH of the solution is defined as negative logarithm of hydroxide ion concentration present in the solution .
The pOH of the solution = 10.53
The pH of the solution = ?
Here, the pH of the solution is less than 7 which means that solution acidic.