1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Nata [24]
3 years ago
7

What would be the voltage (Ecell) of a voltaic cell comprised of Cd(s)/Cd2+(aq) and Zr(s)/Zr4+(aq) if the concentrations of the

ions in solution were [Cd2+] = 0.5 M and [Zr4+] = 0.5 M at 298K?
Chemistry
1 answer:
lutik1710 [3]3 years ago
3 0

Answer:

1.05 V

Explanation:

Since;

E°cell= E°cathode- E°anode

E°cathode= -0.40 V

E°anode= -1.45 V

E°cell= -0.40-(-1.45) = 1.05 V

Equation of the process;

2Zr(s) + 4Cd^2+(aq) ---->2Zr^4+(aq) + 4Cd(s)

n= 8 electrons transferred

From Nernst's equation;

Ecell = E°cell - 0.0592/n log Q

Ecell= E°cell - 0.0592/8 log [0.5]/[0.5]

Since log 1=0

Ecell= E°cell= 1.05 V

You might be interested in
A chemical reaction occurring in a cylinder equipped with a moveable piston produces 0.641 mol of a gaseous product. If the cyli
snow_tiger [21]

<u>Answer:</u> The final volume of the reaction is 4.69 L

<u>Explanation:</u>

The relationship of number of moles and volume at constant temperature and pressure was given by Avogadro's law. This law states that volume is directly proportional to number of moles at constant temperature and pressure.

The equation used to calculate number of moles is given by:

\frac{V_1}{n_1}=\frac{V_2}{n_2}

where,

V_1\text{ and }n_1 are the initial volume and number of moles

V_2\text{ and }n_2 are the final volume and number of moles

We are given:

V_1=2.05L\\n_1=0.280mol\\V_2=?L\\n_2=0.641mol

Putting values in above equation, we get:

\frac{2.05}{0.280}=\frac{V_2}{0.641}\\\\V_2=\frac{2.05\times 0.641}{0.280}=4.69L

Hence, the final volume of the reaction is 4.69 L

3 0
3 years ago
How many moles in 32.7 grams of water vapor?
mestny [16]
To find moles from grams divide the number of moles by the molar mass...

32.7g/18.01 which is 1.82 using significant figure rules
4 0
3 years ago
A 2.50 L solution contains 5.00 g of NaOH, which has a molecular weight of 40.00
Fantom [35]

Answer:

0.313mol/L

Explanation:

\frac{5.00}{40.00}  \times  2.50 = 0.3125

3 0
3 years ago
In an exothermic reaction:_________ A. The surroundings absorb heat from the reaction mixture. B. The surroundings release heat
Elis [28]

Answer: option A. The surroundings absorb heat from the reaction mixture

Explanation:

7 0
3 years ago
2) What is the concentration (M) of CH3OH in a solution prepared by dissolving 11.7 g of CH3OH in sufficient water to give exact
tatiyna
Molarity is in units of moles/L. So you must determine the moles of CH3OH, then divide by the total volume.

To determine the moles of CH3OH, divide the weight in grams of CH3OH by the molecular weight

11.7g / 32g/mol = 0.366 mol CH3OH

0.366 mol CH3OH / .230 L = your molarity
3 0
3 years ago
Other questions:
  • Mass number is equal to
    10·1 answer
  • Magnesium reacts with hydrochloric acid (HCl) as follows. Mg(s) + 2HCl(aq) --&gt;MgCl(2)+H(2)(g) How many milliliters of hydroge
    10·1 answer
  • At what temperature scale Fahrenheit shows double than Kelvin scale​
    9·1 answer
  • Help this is my test
    12·2 answers
  • What part of an atom is involved in a chemical reaction?
    15·1 answer
  • Determine the number of moles in 382.5g of CO-2
    15·1 answer
  • Why are metal containers not used for storing acids​
    6·1 answer
  • I need helppppp!!!!!!!
    11·1 answer
  • Which of the following statements about minerals and ores is true?
    13·1 answer
  • A 29.4 ml sample of 0.347 m triethylamine, (c2h5)3n, is titrated with 0.375 m hydrobromic acid. at the equivalence point, the ph
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!