1. Calculate the emf of a Copper-Zinc battery with few drops of salt dipped in water....
1. Calculate the emf of a Copper-Zinc battery with few drops of
salt dipped in water.
2. Do we get a higher voltage if salt is dipped into our
Copper-Zinc battery's electrolyte? If yes, why? If not, why
not?
Homework Answers
1. Assuming salt solution contains sodium chloride
Then at the zinc terminal
On the copper terminal water will be electrolysed
or using autoprotolysis
This will happen since sodium has a much lower electron affinity than water/hydronium..
2. If salt is dipped into our copper zinc battery's electolyte, we get a higher voltage.
A electrochemical simple cell can be made by dipping two different pieces of metal (copper and zinc) of different reactivity into a salt solution which will act as electrolyte.
Due to the series connection, the voltage is increased and you might light a bulb! having made a crude battery!
Add Answer to:
1. Calculate the emf of a Copper-Zinc battery with few drops of
salt dipped in water....
1) A metal "X" is used as a “sacrificial” anode on hulls of salt water vessels...
1) A metal "X" is used as a “sacrificial” anode on hulls of salt water vessels made of iron. The effect is to reverse the oxidation of iron to iron (II) by causing X to oxidize to the X ion. Calculate the voltage (in V, to two decimal places) for this reaction if it takes place under standard conditions. The standard reduction potential for X is -0.57 V (minus 0.57 V). 2) Batteries are charged and discharged due to the...
1) High quality Au/Aus+ and Zn/Zn half-cells were connected with a salt bridge. Samples of water...
1) High quality Au/Aus+ and Zn/Zn half-cells were connected with a salt bridge. Samples of water containing traces of Au(III) ions were studied using Zn(s) dipped in 1.000 M Zn²+ and Au(s) dipped in the various water samples. Standard reduction potentials from your textbook are: Aut(aq) + 3e → Au(s) +1.42 V Zn²+ (aq) + 2e → Zn(s) -0.76 V a. Determine which half-reaction is the oxidation half-reaction and which is the reduction half-reaction. b. Determine the standard cell potential...
the emf provided by the battery is 12.6 V 1 Current Density and Drift Speed a)...
the emf provided by the battery
is 12.6 V
1 Current Density and Drift Speed a) (8 pts) A group of charges, each with charge q, moves with velocity v. The number of particles per unit volume is n. What is the current density J of these charges, in magnitude and direction? Make sure that your answer has units of Alm b) (8 pts) We want to calculate how long it takes an electron to get from a car battery...
Problem 26.44 13 of 14 Part A Constants | Periodic Table In the figure, the total resistance is 12.8 k2, and the battery's emf is 28.8 V.If the time constant is measured to be 23.0148 Figure 1) C...
Problem 26.44 13 of 14 Part A Constants | Periodic Table In the figure, the total resistance is 12.8 k2, and the battery's emf is 28.8 V.If the time constant is measured to be 23.0148 Figure 1) Calculate the total capacitance of the circuit. C 1.80x109 F Correct Part B Calculate the time it takes for the voltage across the resistor to reach 17.6 V after the switch is closed. Figure 1 of 1 Submit X Incorrect, Try Again; 4...
1) To calculate the depth of a water well, an explorer drops a stone and with...
1) To calculate the depth of a water well, an explorer drops a stone and with its stopwatch measures the time needed to hear the moment when the stone hits the water. Considering that the speed of sound in the air is 343m / s and the time elapsed to hear the sound is 4 seconds, what is the depth of the well? 2) From a window that is 10m from the ground, a stone is dropped at the same...
Calculate the theoretical cell potential (E°) of a galvanic cell under standard conditions made up of...
Calculate the theoretical cell potential (E°) of a galvanic cell
under standard conditions made up of copper and magnesium (see Part
II and Table 1 for more information).
PARTIL Creating and Testing Voltaic Cells Introduction and Background for the Voltaic Cells A galvanic cell (sometimes more appropriately called a voltaic cell) consists of two half-cells joined by a salt bridge that allow ions to pass between the two sides in order to maintain electroneutrality. Each half-cell contains the Components of...
1- Which battery system is based on half reactions involving zinc metal and manganese dioxide? Select...
1- Which battery system is based on half reactions involving zinc metal and manganese dioxide? Select one: a. None of these b. dry-cell batteries c. lead-acid storage batteries d. alkaline batteries e. fuel cells 2- According to the collision theory of chemical reactions: Select one: a. low energy collisions result in many successful reactions as there is sufficient time for the reactants to form products. b. low energy collisions do not occur in the gas phase. c. high energy collisions...
Prelab Activity: Electrochemical Cells To determine the solubility product of copper(II) carbonate, CuCO3 , a concentration...
Prelab Activity:
Electrochemical Cells
To determine the solubility product of copper(II) carbonate,
CuCO3 , a concentration cell as described on pages 71-72
of the lab handout is constructed. The temperature of the Galvanic
cell is measured to be 22.5°C, and the cell potential 282 mV (0.282
V). Using this data and Equation 8 in the lab manual, calculate the
Ksp for CuCO3 and report your answer with
three significant digits.
For the Galvanic cell you will construct in PART B,...
Heat lamp or drying oven Hydrated copper chloride Distilled water Aluminum wire 30-ml beaker Glass rod...
Heat lamp or drying oven Hydrated copper chloride Distilled water Aluminum wire 30-ml beaker Glass rod Watch glass Buchner fiannel Hot plate Ethanol Füter paper CAUTION: Wear all safety equipment, follow all normal safety procedures and experiment as directed by your instructor follow instructions. Dispose of all liquid AND solid waste products from the 1. Weigh a clean, dry 30-mL beaker and record its mass to 3 decimal places. When-it-is-time,heat the beaker 2. Add approximately 1.00 gram of the hydrated...
2. *D1* Salt water is plentiful on earth; natural supplies of fresh water, on the other...
2. *D1* Salt water is plentiful on earth; natural supplies of fresh water, on the other hand, are dwindling while mankind's demands grow. One appealing solution to this imbalance is to remove the salt from ocean water by some means. Here you will investigate the energy input that is necessary to accomplish this task. Special membranes can be manufactured that allow water, but not ions, to pass through. By pushing such a membrane through salt solution, one can separate salt...
1) High quality Au/Aus+ and Zn/Zn half-cells were connected with a salt bridge. Samples of water containing traces of Au(III) ions were studied using Zn(s) dipped in 1.000 M Zn²+ and Au(s) dipped in the various water samples. Standard reduction potentials from your textbook are: Aut(aq) + 3e → Au(s) +1.42 V Zn²+ (aq) + 2e → Zn(s) -0.76 V a. Determine which half-reaction is the oxidation half-reaction and which is the reduction half-reaction. b. Determine the standard cell potential...
the emf provided by the battery
is 12.6 V
1 Current Density and Drift Speed a) (8 pts) A group of charges, each with charge q, moves with velocity v. The number of particles per unit volume is n. What is the current density J of these charges, in magnitude and direction? Make sure that your answer has units of Alm b) (8 pts) We want to calculate how long it takes an electron to get from a car battery...
Problem 26.44 13 of 14 Part A Constants | Periodic Table In the figure, the total resistance is 12.8 k2, and the battery's emf is 28.8 V.If the time constant is measured to be 23.0148 Figure 1) Calculate the total capacitance of the circuit. C 1.80x109 F Correct Part B Calculate the time it takes for the voltage across the resistor to reach 17.6 V after the switch is closed. Figure 1 of 1 Submit X Incorrect, Try Again; 4...
Calculate the theoretical cell potential (E°) of a galvanic cell
under standard conditions made up of copper and magnesium (see Part
II and Table 1 for more information).
PARTIL Creating and Testing Voltaic Cells Introduction and Background for the Voltaic Cells A galvanic cell (sometimes more appropriately called a voltaic cell) consists of two half-cells joined by a salt bridge that allow ions to pass between the two sides in order to maintain electroneutrality. Each half-cell contains the Components of...
Prelab Activity:
Electrochemical Cells
To determine the solubility product of copper(II) carbonate,
CuCO3 , a concentration cell as described on pages 71-72
of the lab handout is constructed. The temperature of the Galvanic
cell is measured to be 22.5°C, and the cell potential 282 mV (0.282
V). Using this data and Equation 8 in the lab manual, calculate the
Ksp for CuCO3 and report your answer with
three significant digits.
For the Galvanic cell you will construct in PART B,...
Heat lamp or drying oven Hydrated copper chloride Distilled water Aluminum wire 30-ml beaker Glass rod Watch glass Buchner fiannel Hot plate Ethanol Füter paper CAUTION: Wear all safety equipment, follow all normal safety procedures and experiment as directed by your instructor follow instructions. Dispose of all liquid AND solid waste products from the 1. Weigh a clean, dry 30-mL beaker and record its mass to 3 decimal places. When-it-is-time,heat the beaker 2. Add approximately 1.00 gram of the hydrated...
2. *D1* Salt water is plentiful on earth; natural supplies of fresh water, on the other hand, are dwindling while mankind's demands grow. One appealing solution to this imbalance is to remove the salt from ocean water by some means. Here you will investigate the energy input that is necessary to accomplish this task. Special membranes can be manufactured that allow water, but not ions, to pass through. By pushing such a membrane through salt solution, one can separate salt...
Most questions answered within 3 hours.
-
Let X be the amount of damage a particular company pays out (in
$) for a...
asked 34 minutes ago -
1. Choose the answer that is closest to the definition of a
significance level
a) If...
asked 1 hour ago -
When light is refracted, on what does the angle of refraction
depend? Select all that apply....
asked 1 hour ago -
A (726) g mass is hung on a spring. As a result the spring
stretches (16.5)...
asked 3 hours ago -
SOLUTION NOT NEEDED ONLY NEED THE ANSWERS, HOMEWORK IS DUE IN 30
MINUTES.
4)Which of the...
asked 3 hours ago -
You will select one card from a standard deck of 52 cards. What
is the probability...
asked 3 hours ago -
50% of the volume of a boat, sailing down the Mississippi (where
the water density ρ...
asked 4 hours ago -
Calculate how many moles of ions are in 1.4 L of 2.9 M KNO2
(aq). Remember...
asked 4 hours ago -
Experiment:
In the experiment: Mix together 74 g. (92 ml.) of n-butyl
alcohol and 120 g....
asked 5 hours ago -
This Python module will be menu driven
and use conditions to check user input in order...
asked 5 hours ago -
Tip Calculator App
For this project, you will create a tip calculator Android
app. The user...
asked 6 hours ago -
A first order chemical reaction has an energy of activation of
90.0 kJ/mol and a rate...
asked 7 hours ago