Chemistry, 14.09.2019 08:30 kristen0517
Modern coins are made using an electrochemical plating process: the mint starts with a steel core, which can be assumed to be pure iron. step 1: electrochemically coat the steel (iron) core with copper using a copper(ii) solution step 2: electrochemically coat the copper/steel core from step 1 with nickel using a nickel(ii) solution. (1 mark) write a balanced chemical equation for the reaction between iron and copper(ii) in step 1. a. b. (1 mark) what is the minimum voltage in units of volts that is required or is produced to coat the copper with nickel under standard conditions? the reaction is: cu(s)+ ni2.(aq)-cu2 (aq)+ ni(s) (1 mark) for each electrochemical step, indicate whether it is spontaneous or not spontaneous (circle the correct answer). c. step 2 step 1 not spontaneous not spontaneous spontaneous spontaneous (1.5 marks) if step 2 is carried out in a solution that is 0.0025 m copper(ii) and 5.4 m nickel (ii), d. what is the minimum voltage in units of volts that is required or is produced? (1.5 marks) rhodium is commonly plated on to gold and silver coin items to prevent tarnishing. the item to be plated is attached to the cathode and immersed in a 0.020 m solution of rhodium (lii). a current of 2.5 a is applied using a 3.0 v power supply across a platinum anode and the cathode for 3.5 minutes at 25°c. what mass of rhodium is deposited? e.
Answers: 2
Chemistry, 21.06.2019 19:30, jetblackcap
The molecular formula for caffeine is cshion402. which of the following elements is not found in caffeine?
Answers: 1
Chemistry, 22.06.2019 12:00, luffybunny
There is one girl i like and i don't know how to tell her that, i have a feeling she knows but if she doesn't i don't want to make a fool out of myself how is one way to boost my confidence on asking her out
Answers: 1
Modern coins are made using an electrochemical plating process: the mint starts with a steel core,...
Chemistry, 29.11.2019 18:31
History, 29.11.2019 18:31
Geography, 29.11.2019 18:31
Chemistry, 29.11.2019 18:31
Mathematics, 29.11.2019 18:31
Mathematics, 29.11.2019 18:31