Concept explainers
Interpretation: It has to be explained the reason for if the paint is placed between the copper and the zinc, the zinc will still corrode in seawater, but it will not protect the copper from corrosion.
Concept introduction: Corrosion is a natural process. The destruction of metals by
Sacrificial anodes are highly active metals that are used to prevent a less active metal surface from corrosion.
The loss of electrons is called oxidation whereas the gain of electrons is called reduction.
In an electrochemical cell, at anode oxidation takes place and at cathode reduction takes place.
The copper is oxidized by air in seawater. The
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Chemistry & Chemical Reactivity
- An aqueous solution of an unknown salt of vanadium is electrolyzed by a current of 2.50 amps for 1.90 hours. The electroplating is carried out with an efficiency of 95.0%, resulting in a deposit of 2.850 g of vanadium. a How many faradays are required to deposit the vanadium? b What is the charge on the vanadium ions (based on your calculations)?arrow_forwardAn electrode is prepared by dipping a silver strip into a solution saturated with silver thiocyanate, AgSCN, and containing 0.10 M SCN . The cell potential of the voltaic cell constructed by connecting this electrode as the cathode to the standard hydrogen half-cell as the anode is 0.45 V. What is the solubility product of silver thiocyanate?arrow_forward• calculate the amount of metal plated, the amount of current needed, or the time required for an electrolysis process.arrow_forward
- An electrode is prepared from liquid mercury in contact with a saturated solution of mercury(I) chloride, Hg2Cl, containing 1.00 M Cl . The cell potential of the voltaic cell constructed by connecting this electrode as the cathode to the standard hydrogen half-cell as the anode is 0.268 V. What is the solubility product of mercury(I) chloride?arrow_forward(a) Write equations for the half-reactions that occur at the cathode and the anode when an aqueous solution of KCl is electrolyzed. Which chemical species is oxidized, and which chemical species is reduced in this reaction? (b) Predict the products formed when an aqueous solution of CsI is electrolyzed.arrow_forward
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