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3 years ago

What type of bond forms in iron (2) bromine

Chemistry

1 answer:

jek_recluse [69]3 years ago

8 0

Ionic bond
the metal( iron) gives up the electrons to an non-metal (bromine)

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A certain liquid has a normal freezing point of and a freezing point depression constant . Calculate the freezing point of a sol

katrin2010 [14]

The question is incomplete, the complete question is:

A certain liquid X has a normal freezing point of $0.80^oC$ and a freezing point depression constant $K_f=7.82^oC.kg/mol$ . Calculate the freezing point of a solution made of 81.1 g of iron(III) chloride () dissolved in 850. g of X. Round your answer to significant digits.

Answer: The freezing point of the solution is $-17.6^oC$

Explanation:

Depression in the freezing point is defined as the difference between the freezing point of the pure solvent and the freezing point of the solution.

The expression for the calculation of depression in freezing point is:

$\text{Freezing point of pure solvent}-\text{freezing point of solution}=i\times K_f\times m$

$\text{Freezing point of pure solvent}-\text{Freezing point of solution}=i\times K_f\times \frac{m_{solute}\times 1000}{M_{solute}\times w_{solvent}\text{(in g)}}$ ......(1)

where,

Freezing point of pure solvent = $0.80^oC$

Freezing point of solution = $?^oC$

i = Vant Hoff factor = 4 (for iron (III) chloride as 4 ions are produced in the reaction)

$K_f$ = freezing point depression constant = $7.82^oC/m$

$m_{solute}$ = Given mass of solute (iron (III) chloride) = 81.1 g

$M_{solute}$ = Molar mass of solute (iron (III) chloride) = 162.2 g/mol

$w_{solvent}$ = Mass of solvent (X) = 850. g

Putting values in equation 1, we get:

$0.8-(\text{Freezing point of solution})=4\times 7.82\times \frac{81.1\times 1000}{162.2\times 850}\\\\\text{Freezing point of solution}=[0.8-18.4]^oC\\\\\text{Freezing point of solution}=-17.6^oC$

Hence, the freezing point of the solution is $-17.6^oC$

6 0

3 years ago

If you have 110.0 grams of an unknown compound that contains 12.3 grams of hydrogen, what is the percent by mass of hydrogen in

Vladimir [108]

All you have to do is a simple division "parts over the whole"

12.3 grams H/ 110 grams compound x 100= 11.2%

8 0

3 years ago

Read 2 more answers

What type of matter is salt water?

algol13

Salt water is a Homogeneous Mixture......

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3 years ago

How do the orbits of a comet and earth compare?

TiliK225 [7]

Comets are balls of ice and dust in orbit around the Sun. The orbits of comets are different from those of planets - they are elliptical. A comet's orbit takes it very close to the Sun and then far away again.

8 0

3 years ago

What is the percent composition of phosphoric acid H3PO4

Agata [3.3K]

Hey there!:

Molar mass H3PO4 = 97.9952 g/mol

Atomic Masses :

H = 1.00794 a.m.u

P = 30.973762 a.m.u

O = 15.9994 a.m.u

H % = [ ( 1.00794 * 3 ) / 97.9952 ] * 100

H% = 3.0857 %

P % = [ ( 30.973762 * 1 ) / 97.9952 ] * 100

P% = 31.6074 %

O % = [ ( 15.9994 * 4 ) / 97.9952 ] * 100

O% = 65.3069 %

Hope this helps!

5 0

3 years ago