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Purpose: Which is better, hot or cold water, for removing stains?
Hypothesis: Hot water will remove a stain better than cold water.
Materials
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6 equal squares of white material
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3 packets of ketchup
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1 bowl hot water (130 degrees F)
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1 bowl of cold water (est. 68 degrees F)
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1 Tbsp. Oxydol detergent in each bowl
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Procedure
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1. |
Stain white cloth with ketchup.
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2. |
Cut material into equal squares.
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3. |
Place stained material in a bowl of hot water and a bowl of cold water, each with detergent.
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4. |
Check cloth for stain removal every minute for 15 minutes.
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Conclusion: Is hot or cold water better in removing stains?
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Hot |
5 min. - no change
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10 min. - visible loss of stain
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15 min. - increased loss of stain
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Cold |
5 min. - no change
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10 min. - slight loss of stain
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15 min. - more loss of stain
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Conclusion: Hot water removes stains better than cold water.
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