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babymother [125]
3 years ago
9

Which statement is true about a neutral solution? Its pH is less than 7. Its pH is greater than 7. It has the same concentration

of hydronium and hydroxide ions. It has a greater concentration of hydroxide ion than hydronium ions.
Chemistry
2 answers:
kumpel [21]3 years ago
7 0

Answer:

Option C It has the same concentration of hydronium and hydroxide ions is correct.

Explanation:

A neutral solution will have pH=7

and the concentration of hydronium ions and hydroixde ions is the same.

So, Option C It has the same concentration of hydronium and hydroxide ions

is correct.

katrin [286]3 years ago
6 0

Answer: Option (c) is the correct answer.

Explanation:

A solution whose pH is less than 7 is known as an acidic solution. In this solution, concentration of hydrogen ions is more than hydroxide ions.

Whereas a solution whose pH is more than 7 is known as a basic solution. In this solution, concentration of hydroxide ions is more than hydrogen ions.

On the other hand, when pH of a solution is equal to 7 then the solution will be known as neutral solution. That is, the concentration of both hydrogen and hydroxide ions is same in a neutral solution.

Thus, we can conclude that the statement it has the same concentration of hydronium and hydroxide ions, is true about a neutral solution.

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Pls help Which statement is true about the environment of urban areas?
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The correct answer is A. Urban areas have higher temperatures.

Explanation

Urban Area is a term to refer to cities. Urban areas are characterized by having a developed infrastructure (wide roads, vehicular bridges, wide platforms, tall buildings, residential areas, industrial areas, among others).

Recent studies affirm that urban areas are warmer than surrounding areas; This phenomenon is because the materials with are built buildings, roads, houses, and others, concentrate the sun's rays, increasing the temperature of cities. In addition, the lack of trees deepens this phenomenon, because the trees contribute to cooling by physicochemical processes such as evapotranspiration.

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The answer is 4.9 moles of salt will be needed to add to 1 kg of water to change the boiling point by 5 °C.

<h3>What is Boiling Point Elevation ?</h3>

Boiling point elevation is the phenomenon that occurs when the boiling point of a liquid (a solvent) is increased when another compound is added, such that the solution has a higher boiling point than the pure solvent.

Boiling point elevation occurs whenever a non-volatile solute is added to a pure solvent.

ΔT = i * Kb * m

where m, Kb and i are the molality of solution, ebullioscopic constant and Van't Hoff factor respectively

The data given in the question is ΔT = 5 °C

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Substituting the values in the above equation

\rm 5 = \rm\dfrac{2\times0.51\times moles \;of \;salt}{1}

\rm moles \;of \;salt = \rm\dfrac{5}{2\times0.51}

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Therefore 4.9 moles of salt will be needed to add to 1 kg of water to change the boiling point by 5 °C.

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