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3 years ago

Which of the following best explains how water is able to dissolve ionic substances?

2 answers:

8 0

Answer: The positive and negative charges of the water molecule pull on the negative and positive ends of the ionic molecule to break them apart.

Explanation:

Ionic compounds dissolve in polar solvents such as water as like dissolves like. Ionic compounds are made up of ions which remain attracted by coloumbic forces.

Thus to separate the ions, the positive and negative charges of polar solvent pulls the opposite charges of the ionic compounds and thus break them apart. Thus the ionic compounds dissolve in water.

yanalaym [24]3 years ago

7 0

The correct answer to this question is "The positive and negative charges of the water molecule pull on the negative and positive ends of the ionic molecule to break them apart." This best explains how water is able to dissolve ionic substances. Thank you for posting your question. I hope that this answer helped you. Let me know if you need more help.

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Answer:

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How will adding NaCl affect the freezing point of a solution?

lord [1]

Answer is: adding NaCl will lower the freezing point of a solution.

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3 0

3 years ago

Read 2 more answers

determine mass of water formed when 12.5 L NH3(at298K and 1.50atm) is reacted with 18.9L of O2 (at 323K and 1.1atm)

sasho [114]

The mass of water formed is

<u><em>calculation</em></u>

Use the ideal gas equation to calculate the moles of NH3 and O2

that is Pv= n RT

where; P= pressure,

V= volume,

n = number of moles,

R=gas constant = 0.0821 l .atm/ mol.K

make n the formula of the subject by diving both side by RT

n = PV /RT

The moles of NH3

n= (1.50 atm x 12.5 L) /( 0.0821 L. atm /mol.k x 298 K) =0.766 moles

The moles of O2

=(1.1 atm x 18.9 L) / ( 0.0821 L. atm/ mol.k x 323 K) = 0.784 moles

write the reaction between NH3 and O2

4 NH3 + 5 O2 →4 No +6H2O

from equation above 0.766 moles of NH3 reacted to produce

0.766 x 6/4 =1.149 moles of H2O

0.784 moles of O2 reacted to produce 0.784 x 6/5=0.9408 moles of H20

since O2 is totally consumed, O2 is the limiting reagent and therefore the moles of H2O produced= 0.9408 moles

mass of H2O = moles x molar mass

from periodic table the molar mass of H2O = (1 x2)+16= 18 g/mol

mass = 18 g/mol x 0.9408 moles= 16.93 grams

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3 years ago