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3 years ago

Consider the following reaction taking place in a voltaic cell:

Chemistry

1 answer:

klasskru [66]3 years ago

4 0

Answer:

Option C. Cu is oxidized at the anode and Ag+ is reduced at the cathode.

Explanation:

The reaction that is taking place in the voltaic cell is:

Cu(s) + 2Ag⁺(aq) → Cu²⁺(aq) + 2Ag(s)

A voltaic cell is an electrochemical cell that uses spontaneous redox reactions, like the above, to generate electricity.

In the rection above, the electrode of the anode is Cu, and the electrode of the cathode is Ag. In the cell, the solution of Ag⁺ produces the oxidation of the Cu(s) which results in Cu²⁺ and Ag(s) (since the Ag⁺ is being reduced). In a voltaic cell, the anode is the electrode at which the oxidation reaction occurs and the cathode is the electrode at which the reduction reaction takes place.

The redox reactions in this system release energy, so a wire connects the two reactions and allows electrons to flow from one side to the other, forming the Voltaic (or Galvanic) Cell.

From all of the above, the correct option is c: Cu is oxidized at the anode, and Ag+ is reduced at the cathode.

I hope it helps you!

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HBrO(aq) + H2O(l) ⇄ H3O+(aq) + BrO−(aq) Keq=2.8×10−9

Verdich [7]

Answer: The equilibrium concentration of $BrO^-$ will be much smaller than the equilibrium concentration of $HBrO$ , because Keq<<1

Explanation:

Equilibrium constant is defined as the ratio of concentration of products to the concentration of reactants each raised to the power their stoichiometric ratios. It is expressed as $K_{eq}$

K is the constant of a certain reaction when it is in equilibrium, while Q is the quotient of activities of products and reactants at any stage other than equilibrium of a reaction.

For the given chemical reaction:

$HBrO(aq)+H_2O(l)\rightarrow H_3O^+(aq)+BrO^-(aq)$

The expression for $K_{eq}$ is written as:

$K=\frac{[H_3O^+]\times [BrO^-]}{[HBrO]}$

Concentration of pure solids and liquids is taken as 1.

$K=2.8\times 10^{-9}$

Thus as $K_{eq}$ , That means the concentration of products is less as the reaction does not proceed much towards the forward direction.

7 0

3 years ago

Which of the following correctly describes a compound?

trasher [3.6K]

Answer: Option (a) is the correct statement.

Explanation:

A substance that has two or more number of different atoms which are chemically combined to each other in a fixed ratio by mass is known as a compound.

For example, $Ca + Cl_{2} \rightarrow CaCl_{2}$

Here, $CaCl_{2}$ contains one atom of calcium and two atoms of chlorine which are chemically combined together in 1:2 ratio. Therefore, it is a compound.

Also, both chemical and physical properties of $CaCl_{2}$ will be different from Ca and $Cl_{2}$ .

Thus, we can conclude that the statement atoms are bonded together, and the compound has different physical and chemical properties than the individual element, is correct.

8 0

3 years ago

1.45 moles of helium gas occupies a volume 18.5 L at a pressure of .85 atm. What is the temperature of the gas in K and °C?

Anon25 [30]

Answer: The temperature of the gas is 132.25K and -140.75°C

Explanation:

Given that:

Volume of helium gas (V) = 18.5L

Temperature of helium gas (T) = ?

Pressure (P) = 0.85 atm

Number of moles (n) = 1.45 moles

Molar gas constant (R) is a constant with a value of 0.082 atm L K-1 mol-1

Then, apply the formula for ideal gas equation

pV = nRT

0.85atm x 18.5L = 1.45 moles x 0.082 atm L K-1 mol-1 x T

15.725 atm•L = 0.1189 atm•L•K-1 x T

T = 15.725 atm•L / 0.1189 atm•L•K-1

T = 132.25K

Given that temperature in Kelvin is 132.25, convert it to Celsius by subtracting 273

So, T(in Celsius) = 132.25K - 273

= -140.75°C

Thus, the temperature of the gas is 132.25K and -140.75°C

5 0

4 years ago

___________ a mixture of iron filings and sulfur will make the iron and sulfur atoms combine chemically

musickatia [10]

Iron sulfide is a mixture of iron filings and sulfur will make the iron and sulfur atoms combine chemically.

Hope this helps :)

5 0

3 years ago

Read 2 more answers

Which bond has the least degree of polarity? K-o Li-o No-o Rb - 0

mart [117]

Answer:

k because it is pottassiam

Explanation:

4 0

3 years ago