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Oxidation-Reduction and Electrochemistry

Ice Cream Experiment

This experiment will introduce the concept of homogeneous, heterogeneous, mixtures, solutions, and the colligative property of freezing point. Materials 2 sandwich zip lock bags 2 one-gallon zip lock bags Thermometer 1 cup half-half or 2% milk 2 Tbs. (tablespoons) sugar 1/8 tsp. (teaspoon) flavoring {Choose from: v

Amount of energy required to purify copper using electrolysis?

The purification of copper by electrolysis involves an anode of impure copper and a cathode of pure copper. During the electrolysis, copper (II) ions leave the anode slab and plate onto the cathode slab. The reaction at the anode is Cu(s) = Cu2+(aq) +2e- The reaction at the cathode is Cu2+(aq) + 2e- = Cu(s) Therefore,

Electrochemistry, redox reactions, and inorganic chemistry

4. A practical application problem which I have recently encountered: Recently while a stainless steel reactor vessel was being polished, a problem occurred with the workers' environment. While monitoring atmospheric composition while working in the vessel, high levels of carbon monoxide (above 100 parts per million) were det

Oxidation States of Elements

1. Identify oxidation states of all elements. 3Ag(s) + 4HNOsub3(aq)->3AgNOsub3(aq)+NO(g)+2H2O(l) I have everything except I thought O = -6 but it's wrong. Why? 2a)A 6.35L sample of gas is collected at 55degreeC and 0.892 atm. What volume of the occupy at 1.05 atm and 20.0degree C. PV=nRT (.892)(6.35)=n(o.o821)(55+2

Electrochemistry for Anodes and Cathodes

I am not sure if I have the right out come for this experiment for the following questions 1. Which one is the anode or the cathode? 2. What happens when the flame reaches the open end of the pipet. What property does this show about hydrogen gas? 3. What happens when turmeric indicator is added and connected to the power.

Molecular Structure -Lewis Diagrams

1. Write Lewis electron dot structures for (a) GeCI3-, (b) FC02- (c) CO32-, (d) AICI4-, and (e) FNO. Where more than one resonance structure is important, give examples of all major contributors. 2. Construct Lewis structures of typical resonance contributions of (a) ONC- and (b) NCO- and assign formal charges to each atom. W

Solving for Oxidation

Hi, I need assistance with the following two questions: 1)Determine the oxidation numbers for all elements in the reaction below: 6NaOH(aq) + 2Al(s) ----> 3Hsub2(g) + 2Nasub3AlOsub3(aq) b) Given 2.0g of solid Al in a cleaner, how much hydrogen gas will be produced? 2) Write the balanced molecular equation, complete

Determining Limiting Reagent

Given a solution containing 3.75 grams of PbCl2, you add enough Ru(OH)5 powder to completely use all of the PbCl2. What is the limiting reagent? 1) Complete and balance the reaction. Identify the state of each substance. 2) Identify the type of reaction. 3) Correctly name each reactant and each product. 4) Show the c

Question About Electrolysis

By the electrolysis of water, 11.2L of oxygen at STP was prepared. a) What charge was required? b) If a current of 0.5A was used, how long would it take?

Electrochemistry - Half-reactions and overall cell process

I am trying to determine the separate half-reactions and overall cell process for the following and need some help: A miniature battery is composed of Zn and a paste of KOH, water, mercury (II) oxide, and mercury. Zinc and potassium hydroxide are consumed, mercury is deposited, and potassium zincate is formed. Also, wha

Ion selective electrode problem

The data below is obtained with a potassium ISE. To avoid interferences from H+ and variations in ionic strength all solutions were made to contain 0.33 M Ca(NO3)2 and 0.0010 M NaOH. An unknown solution was similarly prepared and gave a reading of -0.0273 volts. a) What is the slope of the ISE response? (This is the same a

Oxidizing and Reducing Agents

In the following reaction, identify the oxidizing and reducing agents. Cd + NiO2 + 2H2O to Cd(OH)2 + Ni(OH)2 a) Cd+2 is the reducing agent, NiO2 is the oxidizing agent. b) Cd is the reducing agent, H2O is the oxidizing agent. c) Cd is the reducing agent, NiO2 is the oxidizing agent. d) Cd is the reducing agent,

How to identify oxidizing or reducing agents.

6. In the following reaction, identify the oxidizing and reducing agents. 3Ca + VO3 --> 3CaO + V a. Ca+2 is the reducing agent, VO3 is the oxidizing agent b. Ca is the oxidizing agent, VO3 is the reducing agent c. Ca is the reducing agent, V is the oxidizing agent d. Ca is the reducing agent, O-2 is

Molarities of Zinc and Silver Ions in an Electrochemical Cell

It is given that the electrochemical cell is at 298K. At time zero [Zn 2+ ]= 1.0 x 10 ^-3 M and [Ag +] = 0.500 M. Calculate the molarities of zinc and silver ions after a current of 2.00 amperes flow for 20 hours. Please show step by step and the units you are using.