Chemistry, 24.07.2019 23:30, Satoetoe24

Which of the following solutions has the lowest boiling point? select one: a. 0.15 m nacl b. 0.10 m mgbr2 c. 0.15 m ba(no3)2 d. 0.20 m c2h6o2 e. 0.10 m fe(no3)3

Answers: 2

Show answers

Answers

answered: tntaylor862

The solution with the lowest boiling point is: d. 0,20 $C_{2}H_{6}O_{2}$

Explanation:

The boiling point depends on the boiling point elevation which is a colligative property. All colligative properties depend on the concentration of particles (ions) present. So then, the concentration of particles for each point is determined by multiplying the molarity given by the Van’t Hoff factor. Each of these is calculated as follows:

a. 0,15M NaCl

1. The dissolution of sodium chloride can be represented by the following equation:

$NaCl(s)\rightarrow Na^{+}(ac)+Cl^{-}(ac)$ , so we have 2 particles (ions)

2. Replacing the value of 2 particles in the following formula:

$Concentration=(i)*(M)\\Concentration= (2)*(0,15)\\Concentration=0,30$

b. 0.10 M $MgBr_{2}$

1. The dissolution of Magnesium Bromide can be represented by the following equation:

<img src= " alt="MgBr_2\rightarrow Mg^{+2}(ac)+2Br^{-}(ac)" />" />, so we have 3 particles (ions)

2. Replacing the value of 3 particles in the following formula:

$Concentration=(i)*(M)\\Concentration= (3)*(0,10)\\Concentration=0,30$

c. 0,15 M $Ba(NO_{3})_{2}$

1. The dissolution of Barium Nitrate can be represented by the following equation:

$Ba(NO_{3})_{2}\rightarrow Ba^{+2}(ac)+2NO_3^{-1}(ac)$ , so we have 3 particles (ions)

2. Replacing the value of 3 particles in the following formula:

$Concentration=(i)*(M)\\Concentration= (3)*(0,15)\\Concentration=0,45$

d. 0.20M C_2H_6O_2 ;

Ethylene Glycol is a nonelectrolyte instead it is molecular compound. These compounds are formed by nonmetals, they can dissolve in water, but they don’t dissociate in the solution they stay intact, so then i=1 and the concentration of the particles is (0,20)(1)= 0,20.

e. 0.10M $Fe(NO_{3})_{3}$

1. The dissolution of Ferric Nitrate can be represented by the following equation

$Fe(NO_{3})_{3}\rightarrow Fe^{+3}(ac)+3NO_3^{-}(ac)$ , so we have 4 particles (ions),

2. Replacing the value of 4 particles in the following formula:

$Concentration=(i)*(M)\\Concentration= (4)*(0,10)\\Concentration=0,4$

Result: The solution 0.20M C_2H_6O_2 will have the lowest boiling point it has the lowest concentration of ions.

answered: Guest

adding or remove a gaseous reactant or product changes the concentrations. if the concentration of reactant or product is increased, the system will shift away from the side in which concentration was increased (i.e. if the concentration of reactants is increased, the system will shift toward the products. if more products are added, the system will shift to form more reactants). conversely, if the concentration of reactant or product is decreased, the system will shift toward the side in which concentration was decreased (i.e. if reactants are removed, the system will shift to form more reactants. if the concentration of products is decreased, the equilibrium will shift toward the products).

explanation:

answered: Guest

Iwould you figure it out but you don't have a picture or in your question as to what the physical property you're looking for is

Other questions on the subject: Chemistry

Chemistry, 21.06.2019 18:30, tae8002001

How much energy moves onto the next level, in an energy pyramid

Answers: 1

continue

Chemistry, 21.06.2019 21:30, KnMcdonaldk93906

Which substances have the lowest melting points: ionic covalent, or metallic

Answers: 1

continue

Chemistry, 22.06.2019 06:00, hdjsjfjruejchhehd

The tilt of the earth's axis of rotation is responsible for the a) ocean's tides. b) size of the moon. c) brightness of stars. d) earth’s seasons.

Answers: 1

continue

Chemistry, 22.06.2019 12:00, WinterStrikesBack

Solutions of sodium carbonate and silver nitrate react to form solid silver carbonate and a solution of sodium nitrate. a solution containing 3.50 g of sodium carbonate is mixed with one containing 5.00 g of silver nitrate. how many grams of sodium carbonate, silver nitrate, silver carbonate, and sodium nitrate are present after the reaction is complete?

Answers: 2

continue

Do you know the correct answer?

Which of the following solutions has the lowest boiling point? select one: a. 0.15 m nacl b. 0.10...