Give three reasons why the measured voltages in lab may differ from the theoretical voltage.

Q: Voltmeter Readings of Different Hypothetical Metals Metal | 1* 2nd 3rd Average Voltage, Standard…

A: Voltameter reading

Q: When calibrating a pH meter it is necessary to ___________. calibrate the electrode at the…

A: We have to use calibrating a pH meter, As the other test strategies don't give exact and exact…

Q: in a laboratory 250 ml of Potassium chloride (KCl) solution with concentration 0,005 mol/l is needed…

A: 250 mL of 0.005 mole/L KCl solution is prepared from a stock solution, having a concentration of 0.1…

Q: Calcium in a 100.0 mL sample of fuit juice was analyzed by an electrochemical method that gave a…

A: Any particular substance/compound's quantity either in moles or in mass existing into solution's…

Q: The electric field strength between the plates of a simple air capacitor is equal to the voltage…

A: Given -  Voltage across the plates = 64.6 V               Electric field strength between two plates…

Q: calculate the average current used.

A:

Q: What is the measured voltage in Copper and Iron system? * 0.856 + 0.010 mV O 0.647± 0.010 mV O…

A: A multiple choice question based on electrolysis that is to be accomplished.

Q: Calculate the expected voltage Cd | Cd+2 (0.00050M) ||  Cd+2 (0.69 M) | Cd

A: This is a type of concentration cell. Let us try to calculate its voltage. For concentration cell,…

Q: Q1. The conductivity of 0.02 M KCI solution at 25 °C is 2.768x10 S.cm The resistance of this…

A:

Q: electrode will be oxidized?.

A: According to the question an Mg/Mg2+ concentration cell is constructed in which both electrodes are…

Q: Calculate the expected voltage Pt | I- (0.100 M), I2 (1.00 x 10-4 M) || Cr2O7-2 (0.100 M), Cr+3…

A: The cell notation is provided below: Pt | I- (0.100 M), I2 (1.00 x 10-4 M) || Cr2O7-2 (0.100 M),…

Q: types of Electrodes

A: (1) Metallic – Metallic means consisting of partly metal or consisting entirely of metal. The…

Q: ELECTROCHEMISTRY: Copper was electroplated from a Cu2SO4 solution onto an electrode with an active…

A: Cu2SO4 is used for electroplating 7.73cm2 area using current of 4.54A for 0.6978 hours.

Q: A 1.0 M solution of potassium chloride has a specific conductivity of 0.01289 ohm^-1 cm^-1 What is…

A: Given, Concentration, c= 1.0 M Specific conductivity,  = 0.01289 ohm-1cm-1. Area, A = 2.037 cm2…

Q: A flashlight uses batteries that add up to 4.5 V and has a power output of 0.48 W. (a) How much…

A: The solution is as :

Q: Part A: Electrochemical Cell Mass Data for Electochemical Cell   Copper Zinc Initial mass of strip…

A: a) Amount of Zn lost = 0.201 g Thus the theoretical amount of Cu gained must be = 0.201 g

Q: How many coulombs of charge pass through a cell if 1.7 amperes of current are passed through the…

A:

Q: Suppose a current of 590.mA flows through a copper wire for 277. seconds. Calculate how many moles…

A: It is given that:Amount of current flowing through the copper wire = 590 mATime = 277 seconds

Q: Polarography is a subclass of voltammetry where the working electrode is a dropping mercury…

A: DME (dropping mercury electrode) is used as a working electrode in polarography.

Q: Suppose a current of 90. A flows through a copper wire for 145. seconds. Calculate how many moles of…

A: Given- Current ( I ) = 90 Time ( t )= 145 seconds Find mole = ??

Q: e age of

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: Which electrode will be positive? What voltage will the voltmeter show? Assume its positive lead is…

A:

Q: Explain why diamonds are useful for electrodes in batteries

A: Diamonds are useful for electrodes in batteries due to the listed reason:

Q: grams of Ag would be deposited by supplying an electric current of 0.50 A for 30 min

A:

Q: Which pairing of quantity and unit is incorrect? Molar conductivity; S m² mol-1 .a O Resistance; N.…

A: • The molar conductivity of an electrolytic solution is the conductance of the volume of the…

Q: e current in am

A:

Q: Chapter 20 Multiple Choice Question 59 Part A What mass of aluminum can be plated onto an object in…

A: According to Faraday's first law of electrolysis the mass of metal deposited is calculated as…

Q: C) Calculate the voltage for this cell. V Porous Barrier AI Sn 0.435 M AI3+ 0.00212 M Sn²*

A: At anode :  Al ---> Al3+ + 3e-   => E° =  -1.66 V At cathode : Sn2+ + 2e- ---->  Sn =>…

Q: A flashlight uses batteries that add up to 4.5 V and has a power output of 0.48 W. (a) How much…

A: Given that volatage V=4.5 Volts Power P=0.48 Watts. Now we need to calculate Current ( I ) drawn…

Q: Suppose a current of 520. mA flows through a copper wire for 27.0 minutes Calculate how many moles…

A: Given information: Time (t) = 27.0 minutes Current (I) = 520 mA

Q: If the electric current is 8 and the voltage is 2, then what is the resistance? 0.25 4 6 D 10

A: Given data,Voltage(V)=2VCurrent(I)=8A

Q: When can a cell generate an electric current?

A:

Q: part A Use the information provided to find the Iron concentration of stick solution (ug /mL)  Part…

A: Stock solution, ferric nitrate = 0.0010 M Fe(NO3)3 -----------> Fe+3 + 3NO3- 1 mole of  Fe(NO3)3…

Q: What is the function of the salt bridge? Wire Wire Voltmeter Salt Zn(s)- Ni(s) bridge Zn² NI (aq)…

A:

Q: Which of the following is the unit for measuring electric resistance? O a ampere b. ohm volt meter

A: The electrical resistance is the term used in the electrochemistry. It is used to measure the flow…

Q: Suppose a current of 80.A flows through a copper wire for 8.0 minutes. Calculate how many moles of…

A:

Q: How much time (in minutes) would it take for 3.5 grams of copper to be plated, if the current is 4.7…

A: The moles of copper to be plated can be calculated as

Q: how do you compute the voltage of manganese dioxide?

A: Here can compute or measure the volatge of a cell not only manganese dioxide, there was so many half…

Q: Suggest possible reasons for the difference between the experimental and calculated voltages.

A: The quantitative expression that shows potential difference in the charge between the two points in…

Q: PSQ-4: A spoon is to be electroplated with Au(s) using a solution containing Au* ions. If 29.55…

A: Coulomb (C) = Ampere (A) x Second (sec) 96480 Coulomb = 1 mol e- Given: Time = 2 hours = (2 ×…

Q: . Dip-coating process is one of the methods for electrode surface modification.

A: True  Dip coating process is one of the methods of electrode surface modification.

Q: Do you have enough information to Yes calculate the cell voltage under standard conditions? No If…

A: Two given half-cell reactions are as follows: Zn2+aq+2e-→Zns       E°=-0.763 V......(1)…

Q: How many grams of silver can be plated onto an object in 11.37 minutes at 5.33 A of current? Ag*(aq)…

A: GivenAg+(aq.)   +  e-  →  Ag(s)Time = t = 11.37 minutes t = 11.37 min * 60 smin = 682.2 sCurrent = I…

Q: complete: reference electrode is N O T ___   i . i n   c o n s t a n t   p o t e n t I a l ii. r…

A:

Potentiometric Titrations

Potentiometric titration is one of the important titration methods and is mainly carried out to characterize acid solutions. It follows a method similar to that of the normal titration technique, but the main difference is that there is no indicator used in the potentiometric titrations. Instead of using an indicator, electrodes are employed for monitoring the whole titration process. A scientist named Robert Behrend did the potentiometric titration for the first time, and it was done using the mercurous solution and potassium chloride.