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2 years ago

Calculate the maximum concentration (in M) of calcium ions (Ca2+) in a solution that

Chemistry

1 answer:

Vilka [71]2 years ago

4 0

The maximum concentration of calcium ions (Ca₂+) in a solution that

contains CO₃ will be 6.18 × 10⁻⁸. The correct option is D).

<h3>What is concentration?</h3>

The concentration of any substance is the presence or the amount of that substance in a specific place. It is also called the molar mass of the substance.

Ksp is the solubility equilibrium of a substance when it remains in its solid state.

The chemical equation will be

CaCO₃ ⇌Ca²⁺+CO₃²⁻

Ksp = [Ca²⁺][CO₃²⁻]

given Ksp = 3.4 × 10⁻⁹ [CO₃²⁻] = 0.055M

[Ca²⁺] = Ksp / [CO₃²⁻] 3.4×10⁻⁹ / 0.055 = 6.18 × 10⁻⁸

Thus, the Ksp of CaCO₃ = 6.18 × 10⁻⁸. The correct option is D).

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Two voltaic cells are to be joined so that one will run the other as an electrolytic cell. In the first cell, one half-cell has

vladimir1956 [14]

Au/Cr cell will run as a voltaic cell and Co/Zn cell will run as an electrolytic cell.

<h3>What is an electrolytic cell?</h3>

An electrolytic cell that uses electrical energy to enable a non-spontaneous redox reaction is known as an electrolytic cell.

Certain chemicals can be electrolyzed using electrolytic cells, which are electrochemical cells.

For example, water can be electrolyzed to create gaseous oxygen and gaseous hydrogen with the use of an electrolytic cell.

The following are the three essential parts of electrolytic cells:

Cathode (which is negatively charged for electrolytic cells)

Anode (which is positively charged for electrolytic cells)

Electrolyte

The reactions for each half cell is given by

$Au^{3+}(aq) + 3e^- \rightleftharpoons Au(s)$ ; E° = 1.50 V

$Cr^{3+}(aq) + 3e^- \rightleftharpoons Cr(s)$ ; E° = –0.74 V

$Co^{2+}(aq) + 2e^- \rightleftharpoons Co(s)$ ; E° = –0.28 V

$Zn^{2+}(aq) + 2e^- \rightleftharpoons Zn(s)$ ; E° = –0.76 V

When the Au/Cr cell will run as a voltaic cell and Co/Zn cell will run as an electrolytic cell, the a difference in the voltages is produced

$E^o_{series} = E^o_{Au/Cr} - E^o_{Co/Zn}$ = 2.24 V – 0.48 V = 1.76 V

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1 year ago

Why the planets shine though they do not have their own light

Gnom [1K]

Planets reflect sunlight. Most planets are close enough to the sun that they can reflect its light and that is why you can see them. Some planets that are far from the sun do not light up because they have no light to reflect.

I hope this was a satisfying answer. Have a great night!

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3 years ago

A 30-g car rolls from a hill 12 cm high and is traveling at 154 cm/s as it travels along a 275 cm horizontal track. What is the

Olegator [25]

Answer:

Explanation:

By definition, the momentum is given by:

p=m*v

Where,

m: car mass

v: speed of the car

Substituting the values in the given definition we have:

p=3*154

Answer:

the momentum of the car is:

4620g * cm/s

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3 years ago

Which of the following has the greatest influence on the size and force of waves?

svlad2 [7]

Wind speed bc The faster the wind, the longer it blows, or the farther it can blow uninterrupted, the bigger the waves.

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Cheryl kept a potted plant near a window. After two days, she observed that the plant had drooped as shown.

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A watering the plant. Plants wilt or droop when there’s not enough water because it helps reduce the amount of a surface area

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