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Question: 

Which liquid causes the greatest amount of change on iron pyrite in 7 days?

Hypothesis: 

If iron pyrite cubes are soaked in salt water, then it would rust faster than other liquids.

Procedure:

1. Label 3 cups of each of the five liquids(fresh water, vinegar, salt water, sugar water, orange juice)
2. Add 100 Ml of water to each cup labeled “water”
3. Repeat Step 2 for vinegar and orange juice
4. Mix 30g salt and 300mL water for salt water and do the same thing with sugar water
5. Pour 100 mL of the the mixture of step 3 into other 2 groups of 3 cups each (salt water for one group and sugar water for another)
6. Put similar iron pyrite in each group of cups
7. Place all the cups behind the coach, in the dining room
8. Check every day(7 days in total, excluding the setup day) and record the observations, fill in the data table on the final day

Data Analysis: 

The data table should be filled out based on the results on the last day by using this scale: 

0-no color change

1-minimal amount of color change

2-some color change 

3-moderate color change 

4-substantial color change

5-greatest change on color

According to the data table, these are the results: 

The Effect of Different liquids on the Rust of Iron Pyrite Cubes