Question

You confirmed the pH values of the 7 sample solutions via the color of the pH indicator. You then used the known pH values to
the cabbage pH indicator scale’s colors.

Answer 1

It looks like you’re writing a sentence for a lab report. Here are several clear ways to state what you did, with slight differences in tone and detail so you can pick the best fit.

Simple/concise
- "We confirmed the pH values of the seven sample solutions by comparing their indicator colors to a standard pH indicator, then used those known pH values to assign pH values to the colors on the cabbage indicator scale."

Formal/passive (methods-style)
- "The pH of seven sample solutions was confirmed by the color produced with a commercial pH indicator. The confirmed pH values were then used to calibrate the color scale of the red cabbage pH indicator."

Detailed (for results/discussion)
- "After determining the pH of each of the seven samples using a standard pH indicator, we matched the observed colors of the red cabbage indicator to those known pH values to produce a calibrated cabbage pH color scale. This calibrated scale was then used to estimate pH from cabbage indicator color in subsequent measurements."

If you want, I can:
- Draft a brief methods paragraph or a results paragraph that includes these sentences.
- Create an example table format for presenting the seven sample colors and calibrated pH values.
- Help you write a caption for a photo of the calibrated cabbage indicator.