A student was given a clear, colorless unknown solution in lab and told that the identity was either a salt, base, or acid. To help determine the type of chemical, the student ran the following tests by combining three drops of unknown with the following reagents. Which category would the unknown fall in? Test Result 3 drops 0.1 M nickel(II) nitrate (clear, green) green precipitate 1 drop 0.2% phenolphthalein in 50% ethanol/water (clear, colorless) pink solution 3 drops 0.1 M barium hydroxide (clear, colorless) no visible change 3 shavings magnesium metal no visible change
A student was given a clear, colorless unknown solution in lab and told that the identity was either a salt, base, or acid. To help determine the type of chemical, the student ran the following tests by combining three drops of unknown with the following reagents. Which category would the unknown fall in? Test Result 3 drops 0.1 M nickel(II) nitrate (clear, green) green precipitate 1 drop 0.2% phenolphthalein in 50% ethanol/water (clear, colorless) pink solution 3 drops 0.1 M barium hydroxide (clear, colorless) no visible change 3 shavings magnesium metal no visible change
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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A student was given a clear, colorless unknown solution in lab and told that the identity was either a salt, base, or acid. To help determine the type of chemical, the student ran the following tests by combining three drops of unknown with the following reagents. Which category would the unknown fall in?
| Test | Result |
| 3 drops 0.1 M nickel(II) nitrate (clear, green) | green precipitate |
| 1 drop 0.2% phenolphthalein in 50% ethanol/water (clear, colorless) | pink solution |
| 3 drops 0.1 M barium hydroxide (clear, colorless) | no visible change |
| 3 shavings magnesium metal | no visible change |
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