ANSWERS: 2
  • "After adding the sodium cloride, the solution turned yellowish". Note that you didn't say what exact color of yellow, exactly how long it took, etc. No numbers, which differentiates a "qualitative" from a "quantitative" observation.
  • A qualitative observation is an observation made using the five senses. It is the opposite of a quantitative observation which uses numbers and units to describe matter.

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