Assignment:
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Solution Tested
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Bromocresol Green indicator color
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Bromothymol Blue Indicator Color
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Estimated pH
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Distilled water
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Blue
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Yellow
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Greater than 5.4 but less than 6.0
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Distilled water with __4___ drops of acetic acid
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Yellow
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Yellow
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3.8 or less
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Distilled water w/ small sample NaHCO3
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Blue
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Blue
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Greater than 7.6
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Distilled water w/ NaHCO3 and __6___ drops of acetic acid
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Blue
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Yellow
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Greater than 5.4 but less than 6.0
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Ordinary Tap Water
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Blue
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Green
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Between 6.0 and 7.6
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Tap water w/ __1___ drops of acetic acid
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Yellow
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Yellow
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Less than 3.8
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Q1. What effect does adding Acid have to the pH of our water?
Q2. Why would it take more drops of Acetic Acid to change the pH when sodium bicarbonate is dissolved in the water?
Q3. What kind of a system do acetic acid and sodium bicarbonate (NaHCO3) form?
Provide complete and step by step solution for the question and show calculations and use formulas.