A piece of corroded steel plate was found in a submerged ocean vessel. It was estimated that the original area of the plate was 13 in² and that approximately 3.8 kg had corroded away during the submersion. Assuming a corrosion penetration rate of 200 mpy for this alloy in seawater, estimate the time of submersion in years. The density of steel is 7.9 g/cm³. Calculating the submersion time from the corrosion penetration rate (CPR). CPR = = ᏦᎳ pAt

The same cell was used to study 0.100 M NH4CI (ag), and the measured resistance was 28.50 ohms. Calculate the molar conductivity of NH4CI(aq) at this concentration!

A chemist designs a galvanic cell that uses these two half-reactions: MnO4(aq)+8H(aq) +5e Cl₂(g) +2e Write a balanced equation for the half-reaction that happens at the cathode. Write a balanced equation for the half-reaction that happens at the anode. Answer the following questions about this cell. Write a balanced equation for the overall reaction that powers the cell. Be sure the reaction is spontaneous as written. + Do you have enough information to calculate the cell voltage under standard conditions? half-reaction 0 0 Yes Mn²+ (aq) + 4H₂O(1) →Mn²+, 2 C1 (aq) No standard reduction potential Eº 'red = +1.51 V E=+1.359 V red ロ→ロ X 0x19 S

What is electrochemical series. Give 2 elements that can be used to protect steel from corrosion when in contact using sacrificial protection.