Question: How does acid precipitation affect our world?
Hypothesis: If an object is exposed to an acid, then it will deteriorate or break down faster than objects not exposed to an acid.
Test the Hypothesis / Make Observations:
1) At each of the 6 stations, write down the number on the beaker in the correct space in the data table.
2) List what you think the object in the beaker is in the “item” column.
3) In the observations column, describe what the item in the beaker looks like – the color of the item, overall appearance, condition of the item, etc.
4) Carefully dip one piece of litmus paper into the liquid in the beaker. Record the pH in the space in the data table for each object. (Estimate the pH by matching the color of the strip to the key on the litmus paper tube.) Be careful not to spill any of the liquid, or get it on your hands, near your face, etc.
Data:
Hypothesis: If an object is exposed to an acid, then it will deteriorate or break down faster than objects not exposed to an acid.
Test the Hypothesis / Make Observations:
1) At each of the 6 stations, write down the number on the beaker in the correct space in the data table.
2) List what you think the object in the beaker is in the “item” column.
3) In the observations column, describe what the item in the beaker looks like – the color of the item, overall appearance, condition of the item, etc.
4) Carefully dip one piece of litmus paper into the liquid in the beaker. Record the pH in the space in the data table for each object. (Estimate the pH by matching the color of the strip to the key on the litmus paper tube.) Be careful not to spill any of the liquid, or get it on your hands, near your face, etc.
Data:
Beaker #
|
Item
|
Observations
|
pH
|
Analysis: (Write in a complete sentence!)
1) Compare the items in beakers 1 & 2 – how are they different from each other?
2) Compare the items in beakers 3 & 4 – how are they different from each other?
3) Compare the items in beakers 5 & 6 – how are they different from each other?
A pH of 7 is neutral, a pH greater than 7 is a base (like chlorox or baking soda) and a pH less than 7 is an acid (like sulfuric acid or acetic acid).
4) Which beakers contain an acid?
Conclusion: (Write in a complete sentence!)
5) How did the presence of an acid affect the items in the beakers?
6) How does acid precipitation affect our world?
7) What would be another way to test the effects of acid precipitation?