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3 years ago

A student was trying to obtain lithium by electrolysis of aqueous lithium chloride. Was he successful?

Chemistry

1 answer:

Wittaler [7]3 years ago

6 0

The student was not successful.

Consider the standard reduction potentials.

Li⁺ + e⁻ ⇌ Li; E° = -3.04 V

2H₂O + 2e⁻ ⇌ H₂ + 2OH⁻; E° = -0.83 V

To reduce Li⁺ to Li, the student must apply 3.04 V.

However, it takes only 0.83 V to reduce water to hydrogen.

Thus, the student will get H₂ instead of Li.

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A liquid has an empirical formula CCl2, and a boiling point of 1 21 oC. When vapourised, the gaseous compound has a density of 4

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Based on the data given, the molar mass of the gas is 165.5 g/mol while the molecular weight of the gas is 165.5 amu

<h3>How can molar mass of a gas be obtained from density, temperature and pressure?</h3>

The molar mass of a gas can be obtained from density, temperature and pressure using the formula below:

molar mass = density × molar gas constant × temperature/pressure

Molar gas constant, R = R = 0.082 L.atm/mol/K.

Temperature = 150 °C = 423 K

Pressure = 785 torr = 1.033 atm

density = 4.93 g/L

molar mass of gas = 4.93 × 0.082 × 423/1.033

molar mass of gas = 165.5 g/mol

Then, molecular weight of the gas = 165.5 amu

Therefore, the molar mass of the gas is 165.5 g/mol while the molecular weight of the gas is 165.5 amu

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2 years ago

Which element has the smallest atomic radius? Fluorine, Iron, Phosphorous, Potassium

Ivahew [28]

Answer:

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3 years ago

Read 2 more answers

Write 4.13X10^3 in decimal notation.

alukav5142 [94]

Answer:

4.13X10^3= 4130 in the expanded form

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3 years ago

What, if any, experimental evidence do you have that the equilibrium is affected by the addition of NaOH? How is this in accorda

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Sodium Hydroxide (NaOH) is also known as lye which is a base (very high ph; Alkaline)

Now, in chemistry, equilibrium is what affects the reaction rate of a reaction. If they are in equilibrium, the concentrations of them will not change (both reactants and products).

Now, lets say that to synthesize a certain chemical, we need it to be in an acidic environment with HCL or some other acid as the catalyst for the reaction.

Well, if we were to add Sodium Hydroxide to this which is very alkaline, the ph would change greatly which affects the reaction rate. If we do not have enough energy to overcome the activation barrier, the reaction will not occur (atleast for a very long time).

However, a common mistake is thinking that a catalyst will affect the equilibrium. This is not true. The reaction will still take place but it will have a very slow reaction rate.

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3 years ago

HELP ASAP!!!!!!

Sav [38]

1, 4, 1, 2, 1

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We have the following chemical reaction:

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