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What aqueous solution has the highest boiling point at standard pressure? A) 1.0 M KCl(aq) B) 1.0 M CaCl2(aq) C) 2.0 M KCl(aq) D) 2.0 M CaCl2(aq)

Respuesta :

Edufirst
The increase in the boiling point of a solvent is a colligative property.


That means that the increase in the boling point will be related to the number of particles (molecules or ions) present in the solution.


The higher the number of particles (molecules or ions) the higher the increase in the boiling point.


All the aqueous solutions presented are electrolytes, i.e. the solutes are ionic compounds.


Then, you have to compare the number of ions that you have in each solution.


A) 1.0 M KCl ---> 1.0 M K+     +      1.0 MCl-    = 2 moles of particles / liter


B) 1.0 M CaCl2 --> 1.0M Ca(2+)      +      1.0M * 2 Cl (-)    = 3 moles of particle / liter


C) 2.0M KCl ---> 2.0 M K+      +      2.0 M Cl-  = 4 moles of particle / liter


D) 2.0 M CaCl2 ----> 2.0 M Ca (2+)      + 2.0M * 2 Cl (-)  = 6 moles of particle / liter.


Then, the solution 2.0M CaCl2(aq) has the highest increase in the boiling point.


Answer: option D) 2.0 M Ca Cl2(aq)
mahima6824soni

The aqueous solution has the highest boiling point at standard pressure is [tex]\bold{2.0\; M\; CaCl_2(aq)}[/tex]

The correct option is D.

What is the boiling point?

The temperature at which a liquid's vapor pressure matches the pressure surrounding the liquid is known as the boiling point of that substance.

To determine the higher boiling point of any compound or elements, we have to see three factors:

Bonds between two elements.

The molecular weight of an element.

The shape of the compound or element.

Thus, the correct option is D, [tex]\bold{2.0\; M\; CaCl_2(aq)}[/tex].

Learn more about boiling point, here:

https://brainly.com/question/2153588

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