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Vinegar titration with phenol red7Bench observation0

Recent runs

Method BMethod AReference 5Reference 4Reference 3Reference 2

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Experiments/Vinegar titration with phenol red
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Vinegar titration with phenol red

A fixed volume of diluted vinegar is titrated with baking-soda solution until the phenol red indicator flips from yellow to red. The result is the volume of base added at the flip.

Runs recorded

7

Latest Oct 24, 22:36

Typical base added at color flip

4mL

Mean of 5 reference runs

Tracked per run

14

Measurements and conditions

Tamper-evident

All sealed

SHA-256 hash chain per run

Base added at color flip

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2.533.544.5Reference 1: 4 mLReference 2: 4.5 mLReference 3: 4 mLReference 4: 3.5 mLReference 5: 4 mLMethod A: 4 mLMethod AMethod B: 2.5 mLMethod B
Base added at color flip (mL) per runNormal variation: reference mean ± 2 SD across 5 runs

Runs

Newest first. Each run is recorded automatically and sealed.

  1. 1cca015Method BCandidatesyntheticMethod B used 38% less base than Method A, but water source also differed (tap vs distilled) and the assumed cause (mixing time per addition) is contradicted.
2.5mL
22:36
Open verdict
  • fa6cf61Method AControlsynthetic32 commits4mL22:20
  • e1753d8Reference 5Referencesynthetic32 commits4mL21:55
  • 9e289e2Reference 4Referencesynthetic30 commits3.5mL21:41
  • 334cbbbReference 3Referencesynthetic32 commits4mL21:27
  • 077ecc5Reference 2Referencesynthetic34 commits4.5mL21:14
  • c22d78cReference 1Referencesynthetic32 commits4mL21:00
  • Data

    One row per run. Empty cells were not recorded.Download CSV
    RunBase added at color flip (mL)· resultWater sourceVinegar bottleMixing per addition (inversions)Mixing time per addition (s)Liquid temperature (°C)Air quality (raw)Sample volume (mL)Dilution volume (mL)Indicator drops (drops)Starting color (a*)Number of base additions (additions)Time to flip (s)
    Reference 1ReferenceReported by the researcherInferred by Gemini from videoInferred by Gemini from videoMeasured by a sensor or the cameraMeasured by a sensor or the cameraReported by the researcherMeasured by a sensor or the cameraReported by the researcherReported by the researcherReported by the researcherMeasured by a sensor or the cameraReported by the researcherReported by the researcher
    Reference 2ReferenceReported by the researcherInferred by Gemini from videoInferred by Gemini from videoMeasured by a sensor or the cameraMeasured by a sensor or the camera
    Reference 3ReferenceReported by the researcherInferred by Gemini from videoInferred by Gemini from videoMeasured by a sensor or the cameraMeasured by a sensor or the camera
    Reference 4ReferenceReported by the researcherInferred by Gemini from videoInferred by Gemini from videoMeasured by a sensor or the cameraMeasured by a sensor or the camera
    Reference 5ReferenceReported by the researcherInferred by Gemini from videoInferred by Gemini from videoMeasured by a sensor or the cameraMeasured by a sensor or the camera
    Method AControlReported by the researcherInferred by Gemini from videoInferred by Gemini from videoMeasured by a sensor or the cameraMeasured by a sensor or the camera
    Method BCandidateReported by the researcherInferred by Gemini from videoInferred by Gemini from videoMeasured by a sensor or the cameraMeasured by a sensor or the camera
    Reported by the researcher
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    Reported by the researcher
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    Reported by the researcher
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    Reported by the researcher