Problem: Which of the following statements is/are correct?i. Heptane (CH3CH2CH2CH2CH2CH2CH3) is soluble in water.ii. Methylene fluoride (CH2F2 is soluble in butane (CH3CH2CH2CH3)iii. Ammonia is soluble in n-propanol (CH3CH2CH2OH)A. ii onlyB. iii onlyC. i and iiD) ii and iiiE. i and iii

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We’re being asked to determine which of the given statements is/are correct. Each given statement talks about the solubility of the given pair of compounds with each other.

soluble → they will mix and will form a homogeneous mixture
insoluble → they will not mix and will form a heterogeneous mixture


We’re going to use the theory “likes” dissolving “likes”  which states that the solvent can only completely dissolve the solute if they share similar polarity

Therefore, a pure solvent with similar polarity can successfully dissolve a solute to create a solution. 


Let's take a look at each given statement.


i. Heptane (CH3CH2CH2CH2CH2CH2CH3) is soluble in water.

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Problem Details

Which of the following statements is/are correct?

i. Heptane (CH3CH2CH2CH2CH2CH2CH3) is soluble in water.
ii. Methylene fluoride (CH2F2 is soluble in butane (CH3CH2CH2CH3)
iii. Ammonia is soluble in n-propanol (CH3CH2CH2OH)

A. ii only

B. iii only

C. i and ii

D) ii and iii

E. i and iii

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Our tutors have indicated that to solve this problem you will need to apply the Solutions, Molarity and Intermolecular Forces concept. You can view video lessons to learn Solutions, Molarity and Intermolecular Forces. Or if you need more Solutions, Molarity and Intermolecular Forces practice, you can also practice Solutions, Molarity and Intermolecular Forces practice problems.

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Based on our data, we think this problem is relevant for Professor Weiss' class at OREGONSTATE.