I need help please.

Using the following standard reduction potentials, Fe3+(aq) + e- → Fe2+(aq) E° = +0.77 V Ni2+(aq) + 2 e- → Ni(s) E° = -0.23 V ca

lina2011 [118]

Answer: The above reaction is non-spontaneous.

Explanation:

For the given chemical reaction:

$Ni^{2+}(aq.)+2Fe^{2+}(aq.)\rightarrow 2Fe^{3+}(aq.)+Ni(s)$

Here, nickel is getting reduced because it is gaining electrons and iron is getting oxidized because it is loosing electrons.

We know that:

$E^o_{(Fe^{3+}/Fe^{2+})}=0.77V\\E^o_{(Ni^{2+}/Ni)}=-0.23V$

Substance getting oxidized always act as anode and the one getting reduced always act as cathode.

To calculate the $E^o_{cell}$ of the reaction, we use the equation:

$E^o_{cell}=E^o_{cathode}-E^o_{anode}$

$E^o_{cell}=-0.23-0.77=-1.0V$

Relationship between standard Gibbs free energy and standard electrode potential follows:

$\Delta G^o=-nFE^o_{cell}$

As, the standard electrode potential of the cell is coming out to be negative for the above cell. Thus, the standard Gibbs free energy change of the reaction will become positive making the reaction non-spontaneous.

Hence, the above reaction is non-spontaneous.

3 0

2 years ago

How does the law of conservation of mass apply to this reaction

o-na [289]

Atom Appears in these related concepts: Early Ideas about Atoms, Stable Isotopes, and Atomic Theory of Matterbalanced equation Appears in these related concepts: Effect of a Common Ion on Solubility, Reaction Stoichiometry, and Mole-to-Mole Conversionsbond Appears in these related concepts: Factors Affecting the Price of a Bond, Current Maturities of Long-Term Debt, and Preferred Stockchemical reaction Appears in these related concepts: Periodic Table Position and Electron Configuration, Free Energy Changes for Nonstandard States, and Physical and Chemical Changes to Matterchemistry Appears in these related concepts: Description of the Hydrogen Atom, Mass-to-Mole Conversions, and General Trends in Chemical Propertieselement Appears in these related concepts: Development of the Periodic Table, Elements and Compounds, and The Periodic Tableenergy Appears in these related concepts: Surface Tension, Energy Transportation, and Introduction to Work and Energygas Appears in these related concepts: Oxidation Numbers of Metals in Coordination Compounds, Irreversible Addition Reactions, and Microstates and Entropyisolated system Appears in these related concepts: Conservation of Mechanical Energy, Internal Energy, and Comparison of Enthalpy to Internal Energyliquid Appears in these related concepts: Overview of Atomic Structure, Types of Synthetic Organic Polymers, and Three States of Mattermatter Appears in these related concepts: Physical and Chemical Properties of Matter, Introduction: Physics and Matter, and The Study of Chemistrymole Appears in these related concepts: Avogadro's Number and the Mole, Molar Mass of Compounds, and Concept of Osmolality and Milliequivalentsolid Appears in these related concepts: Extractive Metallurgy, Metagenomics, and Some Polycyclic Heterocyclessystem Appears in these related concepts: Definition of Management, Local, regional, national, international, and global marketers , and Additional cost and energy saving suggestions for pumps

8 0

2 years ago

LaShawna and her family went to Yellowstone National Park. They saw a spring called Green Dragon Spring. Steam was rising off th

sergiy2304 [10]

Yes , I agree with the statement water contains minerals

Explanation:

When LaShawna saw the steam, she said that the water must contain a lot of minerals and the statement is true.
Most of the water comes from the underground supply and they undergo some cleaning process and stuff.
Usually, mineral water comes from natural underground water supply and the springs.
Chemical compounds like Calcium, potassium, sodium, iron are present in water.
Magnesium plays an essential function in maintaining blood supply and high mineral content water helps us to prevent or lower the heart-related disease.
Calcium is the building block for maintaining the bone's health.

4 0

3 years ago

Read 2 more answers

If you have a voltage of 120 volts entering your house and a light bulb with 0.625 amperes flowing through it, how many watts is

Luba_88 [7]

Answer:

75 watts

Explanation:

4 0

2 years ago

Read 2 more answers

What is the mass of 8.12 × 10^23 molecules of CO2 gas? (Atomic mass of carbon = 12.011 u; oxygen = 15.999 u.)

amid [387]

Answer:

$m=59.3gCO_2$

Explanation:

Hello,

In this case, the first step is to compute the molar mass of carbon dioxide as shown below, considering it has one carbon atom and two oxygen atoms:

$M=12.011g/mol+2*15.999g/mol\\\\M=44.009g/mol$

It is important to notice it is the mass in one mole of such compound. Afterwards, we need to use the Avogadro's number to compute the how many moles are in the given molecules of carbon dioxide as shown below:

$mol=8.12x10^{23}molec*\frac{1mol}{6.022x10^{23}molec} =1.35mol$

Finally, the mass by using the molar mass:

$m=1.35mol*\frac{44.009g}{1mol} \\\\m=59.3gCO_2$

Best regards.

4 0

2 years ago

I need help please.​

I need help please.