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natima [27]
3 years ago
12

Bio 1 01.04 properties of water

Biology
1 answer:
GarryVolchara [31]3 years ago
3 0


<span>                                          1.04 Properties of Water</span>

Question: What effect will adding soap to water have on surface tension?

 

Hypothesis<span>: If, soap is added to the water slowly dropped on a penny then, the penny will hold more water. </span>

 

Independent/Dependent/Control Variables: Independent: the amount of soap/oil; Dependent: the penny; Control: amount of oil/water given

 

Materials: 3 cups, water, canola or olive oil, dish soap, a pipette and or needle/syringe, pennies

 

<span>Procedure:

</span>

<span>·       </span>Gather three identical cups

<span>·       </span><span>Add water to the first one (1/3 cup of water in each), add water and soap in the second one, and olive or canola oil in the third. </span>

<span>·       </span>Lay out three pennies.

<span>·       </span>Take pipette and slowly bring water in from cup #1, drop onto penny until water falls over, record results of how many drops it took.

<span>·       </span>Repeat with cup numbers 2-3 and record information/data.

Data/Observations: With the regular water on a penny, I noticed that only 13 regular drops could fit on without falling over.

<span>With the water+soap, it got up to 24 drops before falling over. Then on the 25th drop, the mixture fell off. </span>

With the oil, it was the highest at 29 drops before falling over slowly. Therefore, oil holds the most surface tension in this experiment.

 


 





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