Step 1 Place a strip of tape lengthwise on the bottle or jar, as shown in Figure

Question

Step 1 Place a strip of tape lengthwise on the bottle or jar, as shown in Figure 1. Half-fill the bottle or jar with either oil-and-vinegar–type salad dressing or equal amounts of vegetable oil and water or vinegar. Use a pen to mark a line on the tape at the top of each layer. Measure and record the height of each layer (the distance between the layer’s bottom and its top). What observation(s) allows you to determine which substance constitutes the top layer and which one the bottom? What general property of substances is responsible for this positioning? Explain.
Step 2 Add a little more water to the bottle, then remeasure the height of each layer. How can you tell if any of the added water dissolved in the oil? Explain your observations in terms of polarity.
Step 3 Add just enough of one of the additives to your oil and water mixture to enable you to determine and record its position in the bottle. Also record the height of each layer and any other significant observations about the mixture. Gently shake the bottle and note any changes once the layers have again separated.
Step 4 Repeat Step 3 with at least two more of the additives (added one at a time).
Step 5 Add 20–30 drops of liquid soap or detergent to your mixture from Step 4. Shake the bottle well and allow it to stand for several minutes. Record the height of each layer and any other significant observations about the mixture. Explain your observations in terms of the nature of soap and detergent molecules. Step 1 Place a strip of tape lengthwise on the bottle or jar, as shown in Figure 1. Half-fill the bottle or jar with either oil-and-vinegar–type salad dressing or equal amounts of vegetable oil and water or vinegar. Use a pen to mark a line on the tape at the top of each layer. Measure and record the height of each layer (the distance between the layer’s bottom and its top). What observation(s) allows you to determine which substance constitutes the top layer and which one the bottom? What general property of substances is responsible for this positioning? Explain.
Step 2 Add a little more water to the bottle, then remeasure the height of each layer. How can you tell if any of the added water dissolved in the oil? Explain your observations in terms of polarity.
Step 3 Add just enough of one of the additives to your oil and water mixture to enable you to determine and record its position in the bottle. Also record the height of each layer and any other significant observations about the mixture. Gently shake the bottle and note any changes once the layers have again separated.
Step 4 Repeat Step 3 with at least two more of the additives (added one at a time).
Step 5 Add 20–30 drops of liquid soap or detergent to your mixture from Step 4. Shake the bottle well and allow it to stand for several minutes. Record the height of each layer and any other significant observations about the mixture. Explain your observations in terms of the nature of soap and detergent molecules. Step 1 Place a strip of tape lengthwise on the bottle or jar, as shown in Figure 1. Half-fill the bottle or jar with either oil-and-vinegar–type salad dressing or equal amounts of vegetable oil and water or vinegar. Use a pen to mark a line on the tape at the top of each layer. Measure and record the height of each layer (the distance between the layer’s bottom and its top). What observation(s) allows you to determine which substance constitutes the top layer and which one the bottom? What general property of substances is responsible for this positioning? Explain.
Step 2 Add a little more water to the bottle, then remeasure the height of each layer. How can you tell if any of the added water dissolved in the oil? Explain your observations in terms of polarity.
Step 3 Add just enough of one of the additives to your oil and water mixture to enable you to determine and record its position in the bottle. Also record the height of each layer and any other significant observations about the mixture. Gently shake the bottle and note any changes once the layers have again separated.
Step 4 Repeat Step 3 with at least two more of the additives (added one at a time).
Step 5 Add 20–30 drops of liquid soap or detergent to your mixture from Step 4. Shake the bottle well and allow it to stand for several minutes. Record the height of each layer and any other significant observations about the mixture. Explain your observations in terms of the nature of soap and detergent molecules.

Explanation / Answer

Solution:

Step-1

Density is the main factor to determine which substance constitutes the top layer and which one the bottom.water having high density constitutes bottom layer and due to having less density than water ie,vegetable oil will constitute top layer .

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