10 mL of a liquid composed only of carbon and hydrogen is added to a separatory funnel containing 100 mL of water and 100 mL of hexane, an organic solvent. After shaking, the liquids are transferred to graduated cylinders. What are the volumes of the aqueous and organic layers? Aqueous 105 mL; organic 105 mL Aqueous 100 mL; organic 110 mL Aqueous 110 mL; organic 100 mL Cannot be determined

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### Question: Determining Volumes of Aqueous and Organic Layers

10 mL of a liquid composed only of carbon and hydrogen is added to a separatory funnel containing 100 mL of water and 100 mL of hexane, an organic solvent. After shaking, the liquids are transferred to graduated cylinders. What are the volumes of the aqueous and organic layers?

**Options:**

- ○ Aqueous 105 mL; organic 105 mL
- ○ Aqueous 100 mL; organic 110 mL
- ○ Aqueous 110 mL; organic 100 mL
- ○ Cannot be determined

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### Explanation:

**Process Explanation:**

When one mixes a hydrocarbon with water and hexane in a separatory funnel, the hydrocarbon will typically dissolve into the hexane (organic layer) rather than the water (aqueous layer), due to the hydrophobic nature of hydrocarbons. 

Upon shaking the funnel to distribute the hydrocarbon between the two phases and allowing the system to settle into distinct layers, we then measure the volumes of these layers in graduated cylinders. This multiple-choice question tests understanding of the distribution of hydrocarbons in immiscible liquid systems.

**Graph/Diagram (Imagined):**

If there were a diagram accompanying the question, it might include:

1. A separatory funnel illustration with two distinct layers, one labeled "aqueous phase" and the other "organic phase".
2. Graduated cylinders displaying the respective volumes of each layer after separation.

### Answer Interpretation:

Given that hydrocarbons are non-polar and hexane is also a non-polar solvent, the 10 mL of hydrocarbon will primarily reside in the hexane layer.

Total volume assessment:

- Initially, water (aqueous layer): 100 mL
- Initially, hexane (organic layer): 100 mL
- Added hydrocarbon: 10 mL (expected in organic layer due to non-polar nature)

Thus:

- Aqueous layer volume remains unchanged: 100 mL
- Organic layer volume: 100 mL + 10 mL = 110 mL

The correct choice here would be:

- ○ Aqueous 100 mL; organic 110 mL

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Transcribed Image Text:--- ### Question: Determining Volumes of Aqueous and Organic Layers 10 mL of a liquid composed only of carbon and hydrogen is added to a separatory funnel containing 100 mL of water and 100 mL of hexane, an organic solvent. After shaking, the liquids are transferred to graduated cylinders. What are the volumes of the aqueous and organic layers? **Options:** - ○ Aqueous 105 mL; organic 105 mL - ○ Aqueous 100 mL; organic 110 mL - ○ Aqueous 110 mL; organic 100 mL - ○ Cannot be determined --- ### Explanation: **Process Explanation:** When one mixes a hydrocarbon with water and hexane in a separatory funnel, the hydrocarbon will typically dissolve into the hexane (organic layer) rather than the water (aqueous layer), due to the hydrophobic nature of hydrocarbons. Upon shaking the funnel to distribute the hydrocarbon between the two phases and allowing the system to settle into distinct layers, we then measure the volumes of these layers in graduated cylinders. This multiple-choice question tests understanding of the distribution of hydrocarbons in immiscible liquid systems. **Graph/Diagram (Imagined):** If there were a diagram accompanying the question, it might include: 1. A separatory funnel illustration with two distinct layers, one labeled "aqueous phase" and the other "organic phase". 2. Graduated cylinders displaying the respective volumes of each layer after separation. ### Answer Interpretation: Given that hydrocarbons are non-polar and hexane is also a non-polar solvent, the 10 mL of hydrocarbon will primarily reside in the hexane layer. Total volume assessment: - Initially, water (aqueous layer): 100 mL - Initially, hexane (organic layer): 100 mL - Added hydrocarbon: 10 mL (expected in organic layer due to non-polar nature) Thus: - Aqueous layer volume remains unchanged: 100 mL - Organic layer volume: 100 mL + 10 mL = 110 mL The correct choice here would be: - ○ Aqueous 100 mL; organic 110 mL ---
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